./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/down.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_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/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_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/down.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/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_f1c38957-6179-473e-82d7-7b64c728c4a3/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 d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:09:49,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:09:49,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:09:49,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:09:49,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:09:49,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:09:49,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:09:49,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:09:49,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:09:49,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:09:49,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:09:49,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:09:49,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:09:49,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:09:49,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:09:49,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:09:49,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:09:49,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:09:49,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:09:49,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:09:49,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:09:49,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:09:49,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:09:49,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:09:49,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:09:49,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:09:49,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:09:49,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:09:49,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:09:49,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:09:49,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:09:49,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:09:49,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:09:49,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:09:49,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:09:49,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:09:49,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:09:49,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:09:49,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:09:49,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:09:49,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:09:49,658 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:09:49,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:09:49,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:09:49,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:09:49,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:09:49,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:09:49,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:09:49,681 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:09:49,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:09:49,681 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:09:49,682 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:09:49,682 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:09:49,682 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:09:49,682 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:09:49,682 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:09:49,683 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:09:49,683 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:09:49,683 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:09:49,683 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:09:49,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:09:49,684 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:09:49,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:09:49,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:09:49,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:09:49,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:09:49,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:09:49,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:09:49,685 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:09:49,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:09:49,686 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:09:49,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:09:49,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:09:49,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:09:49,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:09:49,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:09:49,687 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:09:49,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:09:49,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:09:49,687 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:09:49,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:09:49,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:09:49,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:09:49,688 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_f1c38957-6179-473e-82d7-7b64c728c4a3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 [2022-12-14 12:09:49,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:09:49,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:09:49,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:09:49,883 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:09:49,884 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:09:49,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loop-invgen/down.i [2022-12-14 12:09:52,380 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:09:52,505 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:09:52,506 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/sv-benchmarks/c/loop-invgen/down.i [2022-12-14 12:09:52,510 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/data/e01364301/53bc73c4649549bd9fe876c8807de304/FLAGf17c7b87f [2022-12-14 12:09:52,521 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/data/e01364301/53bc73c4649549bd9fe876c8807de304 [2022-12-14 12:09:52,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:09:52,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:09:52,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:09:52,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:09:52,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:09:52,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ce347a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52, skipping insertion in model container [2022-12-14 12:09:52,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:09:52,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:09:52,677 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_f1c38957-6179-473e-82d7-7b64c728c4a3/sv-benchmarks/c/loop-invgen/down.i[893,906] [2022-12-14 12:09:52,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:09:52,698 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:09:52,710 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_f1c38957-6179-473e-82d7-7b64c728c4a3/sv-benchmarks/c/loop-invgen/down.i[893,906] [2022-12-14 12:09:52,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:09:52,727 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:09:52,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52 WrapperNode [2022-12-14 12:09:52,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:09:52,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:09:52,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:09:52,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:09:52,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,760 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2022-12-14 12:09:52,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:09:52,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:09:52,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:09:52,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:09:52,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,787 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:09:52,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:09:52,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:09:52,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:09:52,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (1/1) ... [2022-12-14 12:09:52,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:09:52,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:09:52,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:09:52,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:09:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:09:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:09:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:09:52,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:09:52,921 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:09:52,923 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:09:53,006 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:09:53,024 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:09:53,024 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:09:53,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:09:53 BoogieIcfgContainer [2022-12-14 12:09:53,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:09:53,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:09:53,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:09:53,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:09:53,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:09:52" (1/3) ... [2022-12-14 12:09:53,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af72530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:09:53, skipping insertion in model container [2022-12-14 12:09:53,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:09:52" (2/3) ... [2022-12-14 12:09:53,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af72530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:09:53, skipping insertion in model container [2022-12-14 12:09:53,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:09:53" (3/3) ... [2022-12-14 12:09:53,033 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i [2022-12-14 12:09:53,049 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:09:53,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:09:53,085 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:09:53,090 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;@2f1c1862, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:09:53,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:09:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:53,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 12:09:53,098 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:09:53,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 12:09:53,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:09:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:09:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash 70747764, now seen corresponding path program 1 times [2022-12-14 12:09:53,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:09:53,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983914477] [2022-12-14 12:09:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:53,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:09:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:53,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:09:53,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983914477] [2022-12-14 12:09:53,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983914477] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:09:53,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:09:53,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:09:53,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461491250] [2022-12-14 12:09:53,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:09:53,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:09:53,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:09:53,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:09:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:09:53,297 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:09:53,337 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2022-12-14 12:09:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:09:53,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-12-14 12:09:53,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:09:53,345 INFO L225 Difference]: With dead ends: 17 [2022-12-14 12:09:53,345 INFO L226 Difference]: Without dead ends: 8 [2022-12-14 12:09:53,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:09:53,350 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:09:53,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:09:53,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-14 12:09:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-14 12:09:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-12-14 12:09:53,373 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-12-14 12:09:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:09:53,374 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-12-14 12:09:53,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-12-14 12:09:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 12:09:53,374 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:09:53,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 12:09:53,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:09:53,375 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:09:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:09:53,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2136138551, now seen corresponding path program 1 times [2022-12-14 12:09:53,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:09:53,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125923171] [2022-12-14 12:09:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:53,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:09:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:53,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:09:53,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125923171] [2022-12-14 12:09:53,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125923171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:09:53,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406665358] [2022-12-14 12:09:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:53,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:53,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:09:53,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:09:53,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:09:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:53,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:09:53,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:09:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:53,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:09:53,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406665358] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:09:53,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:09:53,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 12:09:53,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096327183] [2022-12-14 12:09:53,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:09:53,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:09:53,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:09:53,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:09:53,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:09:53,569 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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 12:09:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:09:53,611 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-12-14 12:09:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:09:53,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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 12:09:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:09:53,612 INFO L225 Difference]: With dead ends: 18 [2022-12-14 12:09:53,612 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 12:09:53,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:09:53,614 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:09:53,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:09:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 12:09:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 10. [2022-12-14 12:09:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-12-14 12:09:53,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-12-14 12:09:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:09:53,618 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-12-14 12:09:53,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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 12:09:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-12-14 12:09:53,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:09:53,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:09:53,619 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:09:53,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:09:53,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:53,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:09:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:09:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash 831672272, now seen corresponding path program 1 times [2022-12-14 12:09:53,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:09:53,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959157511] [2022-12-14 12:09:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:53,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:09:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:53,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:09:53,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959157511] [2022-12-14 12:09:53,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959157511] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:09:53,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602665424] [2022-12-14 12:09:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:53,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:09:53,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:09:53,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:09:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:53,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:09:53,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:09:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:53,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:09:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:53,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602665424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:09:53,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250295862] [2022-12-14 12:09:54,012 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:09:54,013 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:09:54,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:09:54,019 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:09:54,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:09:54,200 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:09:54,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '175#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:09:54,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:09:54,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:09:54,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-12-14 12:09:54,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49090078] [2022-12-14 12:09:54,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:09:54,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:09:54,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:09:54,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:09:54,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:09:54,302 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:09:54,334 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-12-14 12:09:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:09:54,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 12:09:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:09:54,335 INFO L225 Difference]: With dead ends: 20 [2022-12-14 12:09:54,336 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 12:09:54,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:09:54,337 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:09:54,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:09:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 12:09:54,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-14 12:09:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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 12:09:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-12-14 12:09:54,341 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2022-12-14 12:09:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:09:54,341 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-12-14 12:09:54,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-12-14 12:09:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 12:09:54,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:09:54,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 12:09:54,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:09:54,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:54,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:09:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:09:54,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1308970075, now seen corresponding path program 2 times [2022-12-14 12:09:54,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:09:54,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877954762] [2022-12-14 12:09:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:54,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:09:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:54,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:09:54,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877954762] [2022-12-14 12:09:54,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877954762] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:09:54,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307596136] [2022-12-14 12:09:54,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:09:54,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:54,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:09:54,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:09:54,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:09:54,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:09:54,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:09:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:09:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:09:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:54,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:09:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:54,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307596136] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:09:54,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193645294] [2022-12-14 12:09:54,737 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:09:54,737 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:09:54,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:09:54,737 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:09:54,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:09:54,851 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:09:54,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '294#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:09:54,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:09:54,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:09:54,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-12-14 12:09:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189300067] [2022-12-14 12:09:54,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:09:54,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:09:54,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:09:54,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:09:54,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:09:54,951 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 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 12:09:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:09:55,008 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-12-14 12:09:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:09:55,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 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 10 [2022-12-14 12:09:55,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:09:55,009 INFO L225 Difference]: With dead ends: 22 [2022-12-14 12:09:55,009 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 12:09:55,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:09:55,010 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:09:55,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:09:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 12:09:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2022-12-14 12:09:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-12-14 12:09:55,014 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2022-12-14 12:09:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:09:55,015 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-12-14 12:09:55,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 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 12:09:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-12-14 12:09:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:09:55,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:09:55,015 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 12:09:55,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 12:09:55,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:55,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:09:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:09:55,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1514603660, now seen corresponding path program 3 times [2022-12-14 12:09:55,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:09:55,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586619815] [2022-12-14 12:09:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:55,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:09:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:55,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:09:55,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586619815] [2022-12-14 12:09:55,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586619815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:09:55,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256929386] [2022-12-14 12:09:55,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:09:55,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:55,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:09:55,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:09:55,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:09:55,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:09:55,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:09:55,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:09:55,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:09:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:55,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:09:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:55,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256929386] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:09:55,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277491523] [2022-12-14 12:09:55,500 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:09:55,500 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:09:55,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:09:55,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:09:55,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:09:55,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:09:55,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '443#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:09:55,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:09:55,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:09:55,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-12-14 12:09:55,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908425433] [2022-12-14 12:09:55,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:09:55,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:09:55,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:09:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:09:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:09:55,678 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:09:55,721 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-12-14 12:09:55,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:09:55,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 12:09:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:09:55,722 INFO L225 Difference]: With dead ends: 27 [2022-12-14 12:09:55,722 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 12:09:55,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:09:55,723 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:09:55,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:09:55,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 12:09:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 12:09:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-14 12:09:55,725 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2022-12-14 12:09:55,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:09:55,726 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-14 12:09:55,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-14 12:09:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 12:09:55,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:09:55,726 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2022-12-14 12:09:55,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:09:55,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:55,927 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:09:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:09:55,927 INFO L85 PathProgramCache]: Analyzing trace with hash 821128393, now seen corresponding path program 4 times [2022-12-14 12:09:55,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:09:55,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113918788] [2022-12-14 12:09:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:55,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:09:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:55,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:09:55,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113918788] [2022-12-14 12:09:55,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113918788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:09:55,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338702378] [2022-12-14 12:09:55,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:09:55,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:55,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:09:55,992 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:09:55,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:09:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:56,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:09:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:09:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:56,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:09:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:56,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338702378] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:09:56,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973666246] [2022-12-14 12:09:56,082 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:09:56,082 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:09:56,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:09:56,082 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:09:56,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:09:56,149 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:09:56,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '608#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:09:56,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:09:56,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:09:56,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-12-14 12:09:56,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857426855] [2022-12-14 12:09:56,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:09:56,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:09:56,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:09:56,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:09:56,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:09:56,250 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:09:56,314 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-12-14 12:09:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 12:09:56,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 12:09:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:09:56,315 INFO L225 Difference]: With dead ends: 26 [2022-12-14 12:09:56,315 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 12:09:56,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:09:56,316 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:09:56,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:09:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 12:09:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-12-14 12:09:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-12-14 12:09:56,320 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2022-12-14 12:09:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:09:56,320 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-12-14 12:09:56,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-12-14 12:09:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:09:56,321 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:09:56,321 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1] [2022-12-14 12:09:56,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:09:56,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:56,522 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:09:56,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:09:56,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1892941872, now seen corresponding path program 5 times [2022-12-14 12:09:56,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:09:56,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019147952] [2022-12-14 12:09:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:56,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:09:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:56,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:09:56,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019147952] [2022-12-14 12:09:56,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019147952] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:09:56,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113834987] [2022-12-14 12:09:56,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:09:56,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:56,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:09:56,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:09:56,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:09:56,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:09:56,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:09:56,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:09:56,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:09:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:56,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:09:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:56,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113834987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:09:56,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307397746] [2022-12-14 12:09:56,817 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:09:56,817 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:09:56,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:09:56,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:09:56,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:09:56,874 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:09:57,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '799#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:09:57,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:09:57,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:09:57,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-12-14 12:09:57,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064652023] [2022-12-14 12:09:57,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:09:57,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:09:57,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:09:57,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:09:57,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:09:57,076 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:09:57,130 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-12-14 12:09:57,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:09:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 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 17 [2022-12-14 12:09:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:09:57,131 INFO L225 Difference]: With dead ends: 34 [2022-12-14 12:09:57,131 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 12:09:57,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:09:57,132 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:09:57,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:09:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 12:09:57,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 12:09:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 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 12:09:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-12-14 12:09:57,135 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2022-12-14 12:09:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:09:57,136 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-12-14 12:09:57,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:57,136 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-12-14 12:09:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 12:09:57,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:09:57,136 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2022-12-14 12:09:57,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:09:57,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:57,338 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:09:57,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:09:57,339 INFO L85 PathProgramCache]: Analyzing trace with hash -76431707, now seen corresponding path program 6 times [2022-12-14 12:09:57,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:09:57,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623489127] [2022-12-14 12:09:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:57,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:09:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:57,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:09:57,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623489127] [2022-12-14 12:09:57,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623489127] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:09:57,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781063785] [2022-12-14 12:09:57,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:09:57,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:09:57,514 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:09:57,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:09:57,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:09:57,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:09:57,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 12:09:57,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:09:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:57,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:09:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:57,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781063785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:09:57,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1936549793] [2022-12-14 12:09:57,609 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:09:57,609 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:09:57,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:09:57,609 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:09:57,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:09:57,672 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:09:57,767 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1010#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:09:57,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:09:57,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:09:57,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-12-14 12:09:57,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872264928] [2022-12-14 12:09:57,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:09:57,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 12:09:57,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:09:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 12:09:57,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:09:57,769 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:57,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:09:57,833 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-12-14 12:09:57,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 12:09:57,833 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 12:09:57,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:09:57,833 INFO L225 Difference]: With dead ends: 30 [2022-12-14 12:09:57,833 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 12:09:57,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-12-14 12:09:57,834 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:09:57,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 14 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:09:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 12:09:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-12-14 12:09:57,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-12-14 12:09:57,838 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2022-12-14 12:09:57,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:09:57,838 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-12-14 12:09:57,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-12-14 12:09:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 12:09:57,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:09:57,839 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1] [2022-12-14 12:09:57,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:09:58,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:58,041 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:09:58,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:09:58,043 INFO L85 PathProgramCache]: Analyzing trace with hash -639496076, now seen corresponding path program 7 times [2022-12-14 12:09:58,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:09:58,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653561086] [2022-12-14 12:09:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:58,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:09:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:58,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:09:58,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653561086] [2022-12-14 12:09:58,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653561086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:09:58,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426977734] [2022-12-14 12:09:58,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:09:58,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:58,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:09:58,161 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:09:58,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:09:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:58,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:09:58,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:09:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:58,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:09:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:58,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426977734] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:09:58,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396336753] [2022-12-14 12:09:58,276 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:09:58,276 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:09:58,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:09:58,276 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:09:58,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:09:58,333 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:09:58,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1243#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:09:58,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:09:58,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:09:58,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2022-12-14 12:09:58,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861875987] [2022-12-14 12:09:58,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:09:58,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:09:58,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:09:58,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:09:58,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:09:58,501 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:09:58,552 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-12-14 12:09:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:09:58,553 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 12:09:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:09:58,553 INFO L225 Difference]: With dead ends: 41 [2022-12-14 12:09:58,553 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 12:09:58,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-12-14 12:09:58,554 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:09:58,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 39 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:09:58,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 12:09:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 12:09:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-12-14 12:09:58,558 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2022-12-14 12:09:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:09:58,558 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-12-14 12:09:58,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-12-14 12:09:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 12:09:58,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:09:58,559 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2022-12-14 12:09:58,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:09:58,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:58,761 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:09:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:09:58,761 INFO L85 PathProgramCache]: Analyzing trace with hash 483548361, now seen corresponding path program 8 times [2022-12-14 12:09:58,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:09:58,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819216884] [2022-12-14 12:09:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:58,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:09:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:58,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:09:58,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819216884] [2022-12-14 12:09:58,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819216884] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:09:58,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605078666] [2022-12-14 12:09:58,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:09:58,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:58,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:09:58,873 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:09:58,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:09:58,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 12:09:58,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:09:58,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 12:09:58,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:09:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:58,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:09:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:58,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605078666] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:09:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337703528] [2022-12-14 12:09:58,993 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:09:58,993 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:09:58,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:09:58,994 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:09:58,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:09:59,041 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:09:59,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1500#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:09:59,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:09:59,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:09:59,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2022-12-14 12:09:59,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237528132] [2022-12-14 12:09:59,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:09:59,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:09:59,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:09:59,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:09:59,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:09:59,216 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:09:59,283 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-12-14 12:09:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 12:09:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 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 22 [2022-12-14 12:09:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:09:59,283 INFO L225 Difference]: With dead ends: 34 [2022-12-14 12:09:59,283 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 12:09:59,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-12-14 12:09:59,284 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:09:59,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 14 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:09:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 12:09:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-12-14 12:09:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-12-14 12:09:59,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2022-12-14 12:09:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:09:59,287 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-12-14 12:09:59,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:09:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-12-14 12:09:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:09:59,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:09:59,288 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1] [2022-12-14 12:09:59,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:09:59,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:59,489 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:09:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:09:59,491 INFO L85 PathProgramCache]: Analyzing trace with hash 73732048, now seen corresponding path program 9 times [2022-12-14 12:09:59,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:09:59,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409404636] [2022-12-14 12:09:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:09:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:09:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:09:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:59,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:09:59,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409404636] [2022-12-14 12:09:59,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409404636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:09:59,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016273152] [2022-12-14 12:09:59,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:09:59,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:09:59,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:09:59,687 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:09:59,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:09:59,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:09:59,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:09:59,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 12:09:59,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:09:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:59,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:09:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:09:59,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016273152] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:09:59,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600096553] [2022-12-14 12:09:59,806 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:09:59,806 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:09:59,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:09:59,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:09:59,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:09:59,868 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:00,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1775#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:00,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:00,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:00,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2022-12-14 12:10:00,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086111847] [2022-12-14 12:10:00,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:00,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:10:00,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:00,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:10:00,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:10:00,038 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:00,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:00,108 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-12-14 12:10:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:10:00,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 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 25 [2022-12-14 12:10:00,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:00,109 INFO L225 Difference]: With dead ends: 48 [2022-12-14 12:10:00,109 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 12:10:00,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 56 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-12-14 12:10:00,110 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:00,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 12:10:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 12:10:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-12-14 12:10:00,114 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2022-12-14 12:10:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:00,115 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-12-14 12:10:00,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:00,115 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-12-14 12:10:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 12:10:00,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:00,115 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2022-12-14 12:10:00,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:10:00,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 12:10:00,317 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:00,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2097337947, now seen corresponding path program 10 times [2022-12-14 12:10:00,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:00,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280860399] [2022-12-14 12:10:00,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:00,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:00,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:00,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280860399] [2022-12-14 12:10:00,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280860399] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:00,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507489291] [2022-12-14 12:10:00,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:00,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:00,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:00,424 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:00,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:10:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:00,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 12:10:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:00,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:00,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507489291] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629937827] [2022-12-14 12:10:00,565 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:00,565 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:00,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:00,565 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:00,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:00,616 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:00,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2078#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:00,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:00,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:00,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-12-14 12:10:00,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545586209] [2022-12-14 12:10:00,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:00,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 12:10:00,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:00,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 12:10:00,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:10:00,826 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:00,895 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-12-14 12:10:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 12:10:00,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 12:10:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:00,896 INFO L225 Difference]: With dead ends: 38 [2022-12-14 12:10:00,896 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 12:10:00,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 12 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:10:00,897 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 32 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:00,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 15 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:00,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 12:10:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-12-14 12:10:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:00,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-12-14 12:10:00,901 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2022-12-14 12:10:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:00,901 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-12-14 12:10:00,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:00,901 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-12-14 12:10:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 12:10:00,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:00,901 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1] [2022-12-14 12:10:00,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:10:01,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:01,102 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:01,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1394263412, now seen corresponding path program 11 times [2022-12-14 12:10:01,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:01,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775858401] [2022-12-14 12:10:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:01,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:01,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:01,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775858401] [2022-12-14 12:10:01,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775858401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:01,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824233977] [2022-12-14 12:10:01,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:01,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:01,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:01,327 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:01,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:10:01,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 12:10:01,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 12:10:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:01,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:01,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824233977] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:01,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715370605] [2022-12-14 12:10:01,476 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:01,476 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:01,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:01,476 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:01,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:01,522 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:01,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2395#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:01,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:01,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:01,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2022-12-14 12:10:01,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317811556] [2022-12-14 12:10:01,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:01,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 12:10:01,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:01,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 12:10:01,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:10:01,707 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:01,782 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-12-14 12:10:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 12:10:01,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 12:10:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:01,783 INFO L225 Difference]: With dead ends: 55 [2022-12-14 12:10:01,783 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 12:10:01,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2022-12-14 12:10:01,784 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:01,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 12:10:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-14 12:10:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 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 12:10:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-12-14 12:10:01,789 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2022-12-14 12:10:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:01,789 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-12-14 12:10:01,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-12-14 12:10:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 12:10:01,790 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:01,790 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2022-12-14 12:10:01,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 12:10:01,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:01,992 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:01,993 INFO L85 PathProgramCache]: Analyzing trace with hash 834137289, now seen corresponding path program 12 times [2022-12-14 12:10:01,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:01,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949166368] [2022-12-14 12:10:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:01,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:02,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:02,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949166368] [2022-12-14 12:10:02,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949166368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:02,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733132684] [2022-12-14 12:10:02,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:02,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:02,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:02,108 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:02,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:10:02,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:02,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:02,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 12:10:02,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:02,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:02,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733132684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:02,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445579510] [2022-12-14 12:10:02,258 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:02,258 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:02,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:02,258 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:02,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:02,320 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:02,407 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2744#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:02,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:02,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:02,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-12-14 12:10:02,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017767440] [2022-12-14 12:10:02,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:02,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:10:02,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:02,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:10:02,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:10:02,408 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:02,495 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-12-14 12:10:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 12:10:02,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 12:10:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:02,496 INFO L225 Difference]: With dead ends: 42 [2022-12-14 12:10:02,496 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 12:10:02,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2022-12-14 12:10:02,497 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:02,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 13 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 12:10:02,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-12-14 12:10:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-12-14 12:10:02,502 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-12-14 12:10:02,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:02,502 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-12-14 12:10:02,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-12-14 12:10:02,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 12:10:02,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:02,502 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1] [2022-12-14 12:10:02,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 12:10:02,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 12:10:02,703 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:02,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:02,704 INFO L85 PathProgramCache]: Analyzing trace with hash -891977776, now seen corresponding path program 13 times [2022-12-14 12:10:02,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:02,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459168892] [2022-12-14 12:10:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:02,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:02,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:02,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459168892] [2022-12-14 12:10:02,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459168892] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:02,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531216111] [2022-12-14 12:10:02,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:02,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:02,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:02,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 12:10:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 12:10:02,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:02,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:03,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531216111] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:03,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068377787] [2022-12-14 12:10:03,037 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:03,037 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:03,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:03,037 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:03,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:03,092 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:03,196 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3103#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:03,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:03,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:03,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2022-12-14 12:10:03,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559425618] [2022-12-14 12:10:03,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:03,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 12:10:03,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:03,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 12:10:03,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-14 12:10:03,198 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:03,294 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2022-12-14 12:10:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 12:10:03,294 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-14 12:10:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:03,295 INFO L225 Difference]: With dead ends: 62 [2022-12-14 12:10:03,295 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 12:10:03,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 76 SyntacticMatches, 16 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2022-12-14 12:10:03,295 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:03,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 58 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 12:10:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-14 12:10:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-12-14 12:10:03,299 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2022-12-14 12:10:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:03,299 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-12-14 12:10:03,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:03,299 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-12-14 12:10:03,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 12:10:03,300 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:03,300 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2022-12-14 12:10:03,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 12:10:03,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 12:10:03,501 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:03,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:03,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1026880677, now seen corresponding path program 14 times [2022-12-14 12:10:03,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:03,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657929531] [2022-12-14 12:10:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:03,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:03,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657929531] [2022-12-14 12:10:03,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657929531] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729561610] [2022-12-14 12:10:03,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:03,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:03,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:03,650 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:03,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 12:10:03,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 12:10:03,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 12:10:03,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:03,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:03,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729561610] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:03,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1346669154] [2022-12-14 12:10:03,810 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:03,810 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:03,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:03,811 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:03,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:03,865 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:04,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3498#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:04,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:04,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:04,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-12-14 12:10:04,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955694120] [2022-12-14 12:10:04,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:04,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 12:10:04,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:04,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 12:10:04,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:10:04,032 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:04,158 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-12-14 12:10:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 12:10:04,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 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 34 [2022-12-14 12:10:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:04,159 INFO L225 Difference]: With dead ends: 46 [2022-12-14 12:10:04,159 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 12:10:04,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 85 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2022-12-14 12:10:04,161 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:04,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 16 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 12:10:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2022-12-14 12:10:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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 12:10:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-12-14 12:10:04,166 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2022-12-14 12:10:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:04,166 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-12-14 12:10:04,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-12-14 12:10:04,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 12:10:04,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:04,166 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1] [2022-12-14 12:10:04,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 12:10:04,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:04,368 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:04,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1244980620, now seen corresponding path program 15 times [2022-12-14 12:10:04,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:04,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228148646] [2022-12-14 12:10:04,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:04,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:04,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:04,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228148646] [2022-12-14 12:10:04,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228148646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:04,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232429070] [2022-12-14 12:10:04,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:04,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:04,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:04,557 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:04,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 12:10:04,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:04,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:04,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 12:10:04,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:04,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:04,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232429070] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:04,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672773307] [2022-12-14 12:10:04,781 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:04,782 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:04,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:04,782 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:04,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:04,829 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:05,057 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3899#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:05,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:05,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:05,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 20 [2022-12-14 12:10:05,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664417014] [2022-12-14 12:10:05,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:05,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 12:10:05,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:05,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 12:10:05,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-12-14 12:10:05,060 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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 12:10:05,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:05,185 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-12-14 12:10:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 12:10:05,185 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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) Word has length 37 [2022-12-14 12:10:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:05,186 INFO L225 Difference]: With dead ends: 69 [2022-12-14 12:10:05,186 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 12:10:05,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 86 SyntacticMatches, 18 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 12:10:05,187 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:05,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 63 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 12:10:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-14 12:10:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-12-14 12:10:05,193 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 37 [2022-12-14 12:10:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:05,193 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-12-14 12:10:05,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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 12:10:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-12-14 12:10:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 12:10:05,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:05,194 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2022-12-14 12:10:05,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 12:10:05,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 12:10:05,395 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:05,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1326062793, now seen corresponding path program 16 times [2022-12-14 12:10:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:05,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11781994] [2022-12-14 12:10:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:05,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:05,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:05,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11781994] [2022-12-14 12:10:05,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11781994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:05,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121647721] [2022-12-14 12:10:05,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:05,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:05,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:05,552 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:05,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 12:10:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:10:05,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:05,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:05,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121647721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:05,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1578256060] [2022-12-14 12:10:05,737 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:05,737 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:05,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:05,737 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:05,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:05,779 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:05,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4340#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:05,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:05,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:05,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-12-14 12:10:05,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47998317] [2022-12-14 12:10:05,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:05,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:10:05,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:05,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:10:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:10:05,951 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:06,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:06,048 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2022-12-14 12:10:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 12:10:06,049 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-14 12:10:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:06,049 INFO L225 Difference]: With dead ends: 50 [2022-12-14 12:10:06,049 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 12:10:06,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 18 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2022-12-14 12:10:06,050 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:06,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 17 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 12:10:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-12-14 12:10:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-12-14 12:10:06,053 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2022-12-14 12:10:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:06,054 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-12-14 12:10:06,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-12-14 12:10:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 12:10:06,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:06,054 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1] [2022-12-14 12:10:06,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 12:10:06,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 12:10:06,256 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:06,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:06,257 INFO L85 PathProgramCache]: Analyzing trace with hash -367702064, now seen corresponding path program 17 times [2022-12-14 12:10:06,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:06,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128930593] [2022-12-14 12:10:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:06,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:06,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:06,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128930593] [2022-12-14 12:10:06,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128930593] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:06,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730239437] [2022-12-14 12:10:06,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:06,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:06,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:06,465 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:06,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 12:10:06,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 12:10:06,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:06,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 12:10:06,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:06,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:06,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730239437] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:06,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495373572] [2022-12-14 12:10:06,681 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:06,681 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:06,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:06,682 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:06,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:06,727 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:06,917 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4783#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:06,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:06,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:06,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 22 [2022-12-14 12:10:06,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103987880] [2022-12-14 12:10:06,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:06,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 12:10:06,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:06,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 12:10:06,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-12-14 12:10:06,919 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:07,048 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-12-14 12:10:07,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 12:10:07,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 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 41 [2022-12-14 12:10:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:07,048 INFO L225 Difference]: With dead ends: 76 [2022-12-14 12:10:07,048 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 12:10:07,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 96 SyntacticMatches, 20 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=1117, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 12:10:07,049 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:07,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 67 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 12:10:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 12:10:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-12-14 12:10:07,053 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 41 [2022-12-14 12:10:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:07,053 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-12-14 12:10:07,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-12-14 12:10:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 12:10:07,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:07,054 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2022-12-14 12:10:07,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 12:10:07,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:07,255 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:07,256 INFO L85 PathProgramCache]: Analyzing trace with hash -323936347, now seen corresponding path program 18 times [2022-12-14 12:10:07,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:07,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651591149] [2022-12-14 12:10:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:07,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:07,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:07,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651591149] [2022-12-14 12:10:07,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651591149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:07,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511685653] [2022-12-14 12:10:07,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:07,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:07,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:07,407 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:07,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 12:10:07,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:07,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 12:10:07,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:07,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:07,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511685653] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:07,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1098493106] [2022-12-14 12:10:07,603 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:07,603 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:07,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:07,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:07,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:07,651 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:07,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5270#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:07,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:07,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:07,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2022-12-14 12:10:07,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079136253] [2022-12-14 12:10:07,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:07,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 12:10:07,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 12:10:07,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-12-14 12:10:07,833 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:07,967 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-12-14 12:10:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 12:10:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-14 12:10:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:07,968 INFO L225 Difference]: With dead ends: 54 [2022-12-14 12:10:07,968 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 12:10:07,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 107 SyntacticMatches, 20 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 12:10:07,969 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 50 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:07,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 21 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 12:10:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-12-14 12:10:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-12-14 12:10:07,976 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2022-12-14 12:10:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:07,977 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-12-14 12:10:07,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-12-14 12:10:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:10:07,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:07,977 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1] [2022-12-14 12:10:07,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 12:10:08,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-14 12:10:08,178 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:08,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:08,178 INFO L85 PathProgramCache]: Analyzing trace with hash 408620916, now seen corresponding path program 19 times [2022-12-14 12:10:08,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:08,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742550369] [2022-12-14 12:10:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:08,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:08,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:08,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742550369] [2022-12-14 12:10:08,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742550369] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:08,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521746269] [2022-12-14 12:10:08,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:08,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:08,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:08,377 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:08,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 12:10:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:08,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:10:08,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:08,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:08,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521746269] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:08,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270027181] [2022-12-14 12:10:08,650 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:08,651 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:08,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:08,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:08,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:08,698 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:08,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5755#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:08,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:08,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:08,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 24 [2022-12-14 12:10:08,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014546194] [2022-12-14 12:10:08,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:08,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 12:10:08,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:08,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 12:10:08,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-12-14 12:10:08,839 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:08,989 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2022-12-14 12:10:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:10:08,989 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-14 12:10:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:08,990 INFO L225 Difference]: With dead ends: 83 [2022-12-14 12:10:08,990 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 12:10:08,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 106 SyntacticMatches, 22 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 12:10:08,992 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:08,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 86 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 12:10:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-14 12:10:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-12-14 12:10:08,997 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 45 [2022-12-14 12:10:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:08,997 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-12-14 12:10:08,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-12-14 12:10:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 12:10:08,998 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:08,998 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2022-12-14 12:10:09,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 12:10:09,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:09,199 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:09,200 INFO L85 PathProgramCache]: Analyzing trace with hash -969872183, now seen corresponding path program 20 times [2022-12-14 12:10:09,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:09,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963599508] [2022-12-14 12:10:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:09,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:09,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:09,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963599508] [2022-12-14 12:10:09,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963599508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:09,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484161725] [2022-12-14 12:10:09,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:09,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:09,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:09,438 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:09,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 12:10:09,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 12:10:09,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:09,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 12:10:09,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:09,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:09,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484161725] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:09,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243874367] [2022-12-14 12:10:09,676 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:09,676 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:09,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:09,677 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:09,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:09,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:09,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6288#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:09,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:09,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:09,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2022-12-14 12:10:09,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053544134] [2022-12-14 12:10:09,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:09,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 12:10:09,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:09,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 12:10:09,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:10:09,882 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:10,001 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-12-14 12:10:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 12:10:10,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 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 46 [2022-12-14 12:10:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:10,002 INFO L225 Difference]: With dead ends: 58 [2022-12-14 12:10:10,002 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 12:10:10,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 118 SyntacticMatches, 22 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 12:10:10,003 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:10,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 12:10:10,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2022-12-14 12:10:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-12-14 12:10:10,010 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2022-12-14 12:10:10,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:10,010 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-12-14 12:10:10,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-12-14 12:10:10,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 12:10:10,011 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:10,011 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1] [2022-12-14 12:10:10,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 12:10:10,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 12:10:10,212 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1212383280, now seen corresponding path program 21 times [2022-12-14 12:10:10,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:10,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737886023] [2022-12-14 12:10:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:10,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:10,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737886023] [2022-12-14 12:10:10,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737886023] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194632355] [2022-12-14 12:10:10,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:10,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:10,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:10,434 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:10,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 12:10:10,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:10,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:10,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 12:10:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:10,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:10,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194632355] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:10,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798576192] [2022-12-14 12:10:10,696 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:10,696 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:10,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:10,696 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:10,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:10,737 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:10,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6815#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:10,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:10,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:10,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 26 [2022-12-14 12:10:10,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207536098] [2022-12-14 12:10:10,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:10,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 12:10:10,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:10,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 12:10:10,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-12-14 12:10:10,937 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:11,099 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2022-12-14 12:10:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 12:10:11,099 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 12:10:11,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:11,100 INFO L225 Difference]: With dead ends: 90 [2022-12-14 12:10:11,100 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 12:10:11,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 116 SyntacticMatches, 24 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=391, Invalid=1501, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:10:11,102 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:11,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 121 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 12:10:11,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-14 12:10:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-12-14 12:10:11,110 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2022-12-14 12:10:11,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:11,110 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-12-14 12:10:11,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:11,110 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-12-14 12:10:11,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 12:10:11,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:11,111 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2022-12-14 12:10:11,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 12:10:11,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:11,312 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1576424795, now seen corresponding path program 22 times [2022-12-14 12:10:11,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:11,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472736584] [2022-12-14 12:10:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:11,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:11,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:11,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472736584] [2022-12-14 12:10:11,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472736584] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:11,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957155543] [2022-12-14 12:10:11,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:11,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:11,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:11,491 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:11,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 12:10:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:11,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 12:10:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:11,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:11,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957155543] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:11,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247440932] [2022-12-14 12:10:11,714 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:11,714 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:11,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:11,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:11,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:11,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:11,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7394#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:11,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:11,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:11,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2022-12-14 12:10:11,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054234628] [2022-12-14 12:10:11,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:11,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 12:10:11,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 12:10:11,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-12-14 12:10:11,882 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:12,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:12,050 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2022-12-14 12:10:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 12:10:12,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 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 50 [2022-12-14 12:10:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:12,050 INFO L225 Difference]: With dead ends: 62 [2022-12-14 12:10:12,050 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 12:10:12,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 129 SyntacticMatches, 24 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=375, Invalid=957, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 12:10:12,051 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 58 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:12,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 17 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:12,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 12:10:12,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-12-14 12:10:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-12-14 12:10:12,056 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2022-12-14 12:10:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:12,056 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-12-14 12:10:12,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-12-14 12:10:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 12:10:12,056 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:12,057 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1] [2022-12-14 12:10:12,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 12:10:12,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:12,258 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2093833100, now seen corresponding path program 23 times [2022-12-14 12:10:12,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:12,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386959690] [2022-12-14 12:10:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:12,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:12,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386959690] [2022-12-14 12:10:12,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386959690] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:12,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812132026] [2022-12-14 12:10:12,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:12,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:12,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:12,488 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:12,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 12:10:12,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 12:10:12,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:12,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 12:10:12,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:12,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:12,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812132026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:12,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2050602201] [2022-12-14 12:10:12,733 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:12,733 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:12,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:12,734 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:12,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:12,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:12,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7963#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:12,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:12,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:12,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 28 [2022-12-14 12:10:12,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538942114] [2022-12-14 12:10:12,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:12,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 12:10:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:12,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 12:10:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 12:10:12,880 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:13,038 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2022-12-14 12:10:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 12:10:13,038 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 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 53 [2022-12-14 12:10:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:13,039 INFO L225 Difference]: With dead ends: 97 [2022-12-14 12:10:13,039 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 12:10:13,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 126 SyntacticMatches, 26 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=1714, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 12:10:13,040 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:13,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 12:10:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-12-14 12:10:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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 12:10:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-12-14 12:10:13,046 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 53 [2022-12-14 12:10:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:13,047 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-12-14 12:10:13,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-12-14 12:10:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:10:13,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:13,047 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2022-12-14 12:10:13,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 12:10:13,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 12:10:13,248 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:13,249 INFO L85 PathProgramCache]: Analyzing trace with hash -627811127, now seen corresponding path program 24 times [2022-12-14 12:10:13,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:13,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123484892] [2022-12-14 12:10:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:13,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:13,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:13,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123484892] [2022-12-14 12:10:13,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123484892] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:13,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806359225] [2022-12-14 12:10:13,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:13,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:13,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:13,438 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:13,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 12:10:13,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:13,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:13,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 12:10:13,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:13,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:13,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806359225] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:13,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [135185775] [2022-12-14 12:10:13,665 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:13,665 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:13,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:13,666 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:13,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:13,705 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:13,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8588#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:13,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:13,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:13,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2022-12-14 12:10:13,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310333455] [2022-12-14 12:10:13,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:13,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 12:10:13,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:13,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 12:10:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-12-14 12:10:13,802 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:13,933 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2022-12-14 12:10:13,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 12:10:13,933 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 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 54 [2022-12-14 12:10:13,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:13,934 INFO L225 Difference]: With dead ends: 66 [2022-12-14 12:10:13,934 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 12:10:13,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 26 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=422, Invalid=1060, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 12:10:13,935 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 62 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:13,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 13 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:10:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 12:10:13,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-12-14 12:10:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-12-14 12:10:13,945 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 54 [2022-12-14 12:10:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:13,946 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-12-14 12:10:13,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:13,946 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-12-14 12:10:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 12:10:13,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:13,946 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1] [2022-12-14 12:10:13,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 12:10:14,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 12:10:14,147 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:14,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1466109904, now seen corresponding path program 25 times [2022-12-14 12:10:14,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:14,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726802973] [2022-12-14 12:10:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:14,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:14,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:14,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726802973] [2022-12-14 12:10:14,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726802973] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:14,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899858068] [2022-12-14 12:10:14,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:14,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:14,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:14,403 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:14,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 12:10:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:14,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 12:10:14,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:14,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:14,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899858068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:14,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599337122] [2022-12-14 12:10:14,696 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:14,696 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:14,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:14,696 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:14,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:14,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:14,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9199#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:14,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:14,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:14,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 30 [2022-12-14 12:10:14,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395821436] [2022-12-14 12:10:14,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:14,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 12:10:14,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:14,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 12:10:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 12:10:14,950 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:15,167 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2022-12-14 12:10:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 12:10:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 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 57 [2022-12-14 12:10:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:15,168 INFO L225 Difference]: With dead ends: 104 [2022-12-14 12:10:15,168 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 12:10:15,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 136 SyntacticMatches, 28 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=509, Invalid=1941, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 12:10:15,170 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:15,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 108 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:15,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 12:10:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-14 12:10:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-12-14 12:10:15,179 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 57 [2022-12-14 12:10:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:15,179 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-12-14 12:10:15,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:15,179 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-12-14 12:10:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 12:10:15,180 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:15,180 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2022-12-14 12:10:15,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 12:10:15,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:15,381 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1003918757, now seen corresponding path program 26 times [2022-12-14 12:10:15,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:15,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103293195] [2022-12-14 12:10:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:15,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:15,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:15,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103293195] [2022-12-14 12:10:15,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103293195] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:15,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648020019] [2022-12-14 12:10:15,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:15,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:15,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:15,578 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:15,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 12:10:15,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-12-14 12:10:15,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:15,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 12:10:15,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:15,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:15,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648020019] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:15,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829415799] [2022-12-14 12:10:15,843 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:15,843 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:15,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:15,843 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:15,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:15,888 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:15,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9870#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:15,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:15,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:15,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-12-14 12:10:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164068367] [2022-12-14 12:10:15,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:15,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:10:15,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:10:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:10:15,978 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:16,142 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-12-14 12:10:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 12:10:16,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 58 [2022-12-14 12:10:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:16,143 INFO L225 Difference]: With dead ends: 70 [2022-12-14 12:10:16,143 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 12:10:16,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 151 SyntacticMatches, 28 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1168, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 12:10:16,144 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:16,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 18 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 12:10:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2022-12-14 12:10:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-12-14 12:10:16,151 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 58 [2022-12-14 12:10:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:16,152 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-12-14 12:10:16,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-12-14 12:10:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 12:10:16,152 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:16,152 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1] [2022-12-14 12:10:16,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 12:10:16,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 12:10:16,353 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:16,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:16,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1891228020, now seen corresponding path program 27 times [2022-12-14 12:10:16,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:16,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685166002] [2022-12-14 12:10:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:16,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:16,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:16,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685166002] [2022-12-14 12:10:16,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685166002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:16,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108257903] [2022-12-14 12:10:16,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:16,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:16,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:16,655 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:16,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 12:10:16,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:16,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:16,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 12:10:16,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:16,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:16,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108257903] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:16,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [914671325] [2022-12-14 12:10:16,934 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:16,934 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:16,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:16,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:16,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:16,986 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:17,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10523#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:17,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:17,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:17,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 32 [2022-12-14 12:10:17,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742945675] [2022-12-14 12:10:17,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:17,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 12:10:17,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:17,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 12:10:17,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 12:10:17,241 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:17,443 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2022-12-14 12:10:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 12:10:17,443 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-14 12:10:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:17,443 INFO L225 Difference]: With dead ends: 111 [2022-12-14 12:10:17,443 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 12:10:17,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 146 SyntacticMatches, 30 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=2182, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 12:10:17,444 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:17,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 139 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 12:10:17,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-12-14 12:10:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:17,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-12-14 12:10:17,450 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 61 [2022-12-14 12:10:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:17,450 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-12-14 12:10:17,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-12-14 12:10:17,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 12:10:17,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:17,451 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2022-12-14 12:10:17,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 12:10:17,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 12:10:17,652 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1100770505, now seen corresponding path program 28 times [2022-12-14 12:10:17,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:17,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986532794] [2022-12-14 12:10:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:17,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:17,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986532794] [2022-12-14 12:10:17,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986532794] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:17,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959192633] [2022-12-14 12:10:17,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:17,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:17,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:17,879 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:17,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 12:10:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:17,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 12:10:17,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:17,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:18,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959192633] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [304035249] [2022-12-14 12:10:18,174 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:18,175 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:18,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:18,175 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:18,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:18,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:18,419 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11240#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:18,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:18,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:18,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2022-12-14 12:10:18,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987257595] [2022-12-14 12:10:18,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:18,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 12:10:18,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:18,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 12:10:18,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2022-12-14 12:10:18,420 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:18,585 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2022-12-14 12:10:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 12:10:18,586 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 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 62 [2022-12-14 12:10:18,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:18,586 INFO L225 Difference]: With dead ends: 74 [2022-12-14 12:10:18,586 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 12:10:18,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 162 SyntacticMatches, 30 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=525, Invalid=1281, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 12:10:18,587 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:18,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 14 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 12:10:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-12-14 12:10:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-12-14 12:10:18,595 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2022-12-14 12:10:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:18,595 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-12-14 12:10:18,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-12-14 12:10:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 12:10:18,596 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:18,596 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1] [2022-12-14 12:10:18,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 12:10:18,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:18,797 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:18,798 INFO L85 PathProgramCache]: Analyzing trace with hash 983629776, now seen corresponding path program 29 times [2022-12-14 12:10:18,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:18,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840915800] [2022-12-14 12:10:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:18,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:19,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:19,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840915800] [2022-12-14 12:10:19,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840915800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:19,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92374047] [2022-12-14 12:10:19,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:19,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:19,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:19,145 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:19,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 12:10:19,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-14 12:10:19,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:19,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 12:10:19,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:19,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:19,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92374047] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:19,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574263695] [2022-12-14 12:10:19,490 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:19,490 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:19,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:19,490 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:19,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:19,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:19,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11935#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:19,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:19,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:19,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 34 [2022-12-14 12:10:19,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266039028] [2022-12-14 12:10:19,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:19,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 12:10:19,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:19,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 12:10:19,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 12:10:19,651 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:19,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:19,876 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2022-12-14 12:10:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 12:10:19,876 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-12-14 12:10:19,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:19,877 INFO L225 Difference]: With dead ends: 118 [2022-12-14 12:10:19,877 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 12:10:19,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 156 SyntacticMatches, 32 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=643, Invalid=2437, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 12:10:19,878 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:19,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 140 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 12:10:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-12-14 12:10:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-12-14 12:10:19,884 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 65 [2022-12-14 12:10:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:19,884 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-12-14 12:10:19,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-12-14 12:10:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 12:10:19,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:19,885 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2022-12-14 12:10:19,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 12:10:20,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-14 12:10:20,086 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:20,087 INFO L85 PathProgramCache]: Analyzing trace with hash -424681307, now seen corresponding path program 30 times [2022-12-14 12:10:20,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:20,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061282724] [2022-12-14 12:10:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:20,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:20,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:20,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061282724] [2022-12-14 12:10:20,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061282724] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285538465] [2022-12-14 12:10:20,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:20,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:20,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:20,304 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:20,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 12:10:20,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:20,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:20,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 12:10:20,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:20,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:20,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285538465] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:20,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446457316] [2022-12-14 12:10:20,580 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:20,580 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:20,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:20,580 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:20,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:20,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:20,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12698#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:20,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:20,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:20,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2022-12-14 12:10:20,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342982847] [2022-12-14 12:10:20,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:20,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 12:10:20,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:20,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 12:10:20,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2022-12-14 12:10:20,727 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:20,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:20,894 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2022-12-14 12:10:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 12:10:20,895 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 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 66 [2022-12-14 12:10:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:20,895 INFO L225 Difference]: With dead ends: 78 [2022-12-14 12:10:20,895 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 12:10:20,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 173 SyntacticMatches, 32 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=581, Invalid=1399, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 12:10:20,896 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:20,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 16 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 12:10:20,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2022-12-14 12:10:20,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-12-14 12:10:20,905 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2022-12-14 12:10:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:20,905 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-12-14 12:10:20,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-12-14 12:10:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 12:10:20,906 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:20,906 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1] [2022-12-14 12:10:20,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-14 12:10:21,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:21,107 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:21,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:21,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1297657460, now seen corresponding path program 31 times [2022-12-14 12:10:21,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:21,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516324337] [2022-12-14 12:10:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:21,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:21,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:21,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516324337] [2022-12-14 12:10:21,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516324337] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:21,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580778611] [2022-12-14 12:10:21,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:21,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:21,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:21,478 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:21,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 12:10:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:21,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 12:10:21,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:21,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:21,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580778611] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:21,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829747500] [2022-12-14 12:10:21,920 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:21,920 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:21,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:21,921 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:21,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:21,964 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:22,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13435#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:22,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:22,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:22,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 36 [2022-12-14 12:10:22,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30115245] [2022-12-14 12:10:22,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:22,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 12:10:22,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 12:10:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1346, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 12:10:22,233 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:22,533 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2022-12-14 12:10:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 12:10:22,533 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 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 69 [2022-12-14 12:10:22,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:22,534 INFO L225 Difference]: With dead ends: 125 [2022-12-14 12:10:22,534 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 12:10:22,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 166 SyntacticMatches, 34 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=716, Invalid=2706, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 12:10:22,535 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:22,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 154 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 12:10:22,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-12-14 12:10:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-12-14 12:10:22,542 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 69 [2022-12-14 12:10:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:22,542 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-12-14 12:10:22,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-12-14 12:10:22,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 12:10:22,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:22,542 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2022-12-14 12:10:22,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 12:10:22,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 12:10:22,744 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1565451063, now seen corresponding path program 32 times [2022-12-14 12:10:22,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:22,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428142491] [2022-12-14 12:10:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:22,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:23,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:23,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428142491] [2022-12-14 12:10:23,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428142491] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:23,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502372584] [2022-12-14 12:10:23,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:23,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:23,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:23,005 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:23,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 12:10:23,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-14 12:10:23,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:23,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 12:10:23,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:23,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:23,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502372584] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:23,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976577022] [2022-12-14 12:10:23,309 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:23,309 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:23,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:23,309 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:23,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:23,348 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:23,468 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14244#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:23,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:23,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:23,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2022-12-14 12:10:23,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251060442] [2022-12-14 12:10:23,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:23,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 12:10:23,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:23,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 12:10:23,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-12-14 12:10:23,470 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:23,674 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2022-12-14 12:10:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 12:10:23,674 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 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 70 [2022-12-14 12:10:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:23,675 INFO L225 Difference]: With dead ends: 82 [2022-12-14 12:10:23,675 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 12:10:23,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 184 SyntacticMatches, 34 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=640, Invalid=1522, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 12:10:23,675 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 78 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:23,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 15 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 12:10:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2022-12-14 12:10:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 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 12:10:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-12-14 12:10:23,683 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 70 [2022-12-14 12:10:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:23,684 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-12-14 12:10:23,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-12-14 12:10:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 12:10:23,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:23,684 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1] [2022-12-14 12:10:23,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 12:10:23,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:23,885 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:23,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1592897584, now seen corresponding path program 33 times [2022-12-14 12:10:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:23,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36053091] [2022-12-14 12:10:23,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:23,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:24,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36053091] [2022-12-14 12:10:24,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36053091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292395298] [2022-12-14 12:10:24,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:24,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:24,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:24,282 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:24,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 12:10:24,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:24,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:24,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 12:10:24,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:24,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:24,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292395298] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:24,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1132096697] [2022-12-14 12:10:24,673 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:24,673 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:24,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:24,674 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:24,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:24,716 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:24,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15023#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:24,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:24,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:24,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 38 [2022-12-14 12:10:24,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868306786] [2022-12-14 12:10:24,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:24,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 12:10:24,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:24,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 12:10:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1477, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:10:24,864 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 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 12:10:25,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:25,196 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2022-12-14 12:10:25,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 12:10:25,196 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 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) Word has length 73 [2022-12-14 12:10:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:25,196 INFO L225 Difference]: With dead ends: 132 [2022-12-14 12:10:25,196 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 12:10:25,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 176 SyntacticMatches, 36 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=793, Invalid=2989, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 12:10:25,197 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:25,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 190 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 12:10:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-14 12:10:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-12-14 12:10:25,205 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 73 [2022-12-14 12:10:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:25,205 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-12-14 12:10:25,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 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 12:10:25,205 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-12-14 12:10:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 12:10:25,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:25,205 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2022-12-14 12:10:25,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 12:10:25,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:25,406 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:25,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:25,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1657959515, now seen corresponding path program 34 times [2022-12-14 12:10:25,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:25,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482434126] [2022-12-14 12:10:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:25,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:25,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:25,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482434126] [2022-12-14 12:10:25,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482434126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:25,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135716877] [2022-12-14 12:10:25,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:25,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:25,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:25,690 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:25,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 12:10:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:25,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 12:10:25,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:25,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:26,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135716877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:26,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935604274] [2022-12-14 12:10:26,121 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:26,121 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:26,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:26,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:26,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:26,173 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:26,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15878#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:26,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:26,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:26,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2022-12-14 12:10:26,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989425480] [2022-12-14 12:10:26,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:26,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 12:10:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:26,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 12:10:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2022-12-14 12:10:26,424 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:26,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:26,707 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2022-12-14 12:10:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 12:10:26,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 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 74 [2022-12-14 12:10:26,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:26,708 INFO L225 Difference]: With dead ends: 86 [2022-12-14 12:10:26,708 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 12:10:26,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 195 SyntacticMatches, 36 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=702, Invalid=1650, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 12:10:26,708 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:26,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 18 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 12:10:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2022-12-14 12:10:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-12-14 12:10:26,720 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2022-12-14 12:10:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:26,720 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-12-14 12:10:26,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-12-14 12:10:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 12:10:26,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:26,721 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1] [2022-12-14 12:10:26,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 12:10:26,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 12:10:26,922 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:26,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:26,923 INFO L85 PathProgramCache]: Analyzing trace with hash -143187084, now seen corresponding path program 35 times [2022-12-14 12:10:26,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:26,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343139935] [2022-12-14 12:10:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:26,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:27,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343139935] [2022-12-14 12:10:27,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343139935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631236636] [2022-12-14 12:10:27,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:27,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:27,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:27,387 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:27,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 12:10:27,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-12-14 12:10:27,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 12:10:27,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:27,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:27,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631236636] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:27,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234305150] [2022-12-14 12:10:27,841 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:27,841 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:27,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:27,841 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:27,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:27,886 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:28,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16699#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:28,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:28,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:28,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 40 [2022-12-14 12:10:28,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062621913] [2022-12-14 12:10:28,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:28,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 12:10:28,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:28,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 12:10:28,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 12:10:28,160 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:28,470 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2022-12-14 12:10:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 12:10:28,470 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 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 77 [2022-12-14 12:10:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:28,471 INFO L225 Difference]: With dead ends: 139 [2022-12-14 12:10:28,471 INFO L226 Difference]: Without dead ends: 79 [2022-12-14 12:10:28,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 186 SyntacticMatches, 38 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=874, Invalid=3286, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 12:10:28,472 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:28,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 152 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:28,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-14 12:10:28,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-12-14 12:10:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-12-14 12:10:28,483 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 77 [2022-12-14 12:10:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:28,483 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-12-14 12:10:28,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-12-14 12:10:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 12:10:28,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:28,484 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2022-12-14 12:10:28,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 12:10:28,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 12:10:28,685 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:28,686 INFO L85 PathProgramCache]: Analyzing trace with hash 389704905, now seen corresponding path program 36 times [2022-12-14 12:10:28,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:28,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150033305] [2022-12-14 12:10:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:28,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:28,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:28,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150033305] [2022-12-14 12:10:28,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150033305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:28,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371400653] [2022-12-14 12:10:28,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:28,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:28,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:28,958 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:28,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 12:10:29,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:29,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 12:10:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:29,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:29,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371400653] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:29,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1581385475] [2022-12-14 12:10:29,389 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:29,389 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:29,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:29,389 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:29,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:29,427 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:29,660 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17600#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:29,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:29,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:29,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2022-12-14 12:10:29,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330885186] [2022-12-14 12:10:29,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:29,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 12:10:29,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:29,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 12:10:29,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2022-12-14 12:10:29,662 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:29,949 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2022-12-14 12:10:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 12:10:29,949 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-12-14 12:10:29,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:29,950 INFO L225 Difference]: With dead ends: 90 [2022-12-14 12:10:29,950 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 12:10:29,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 206 SyntacticMatches, 38 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=767, Invalid=1783, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 12:10:29,950 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:29,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 16 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:29,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 12:10:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2022-12-14 12:10:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-12-14 12:10:29,961 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2022-12-14 12:10:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:29,961 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-12-14 12:10:29,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-12-14 12:10:29,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 12:10:29,961 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:29,961 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1] [2022-12-14 12:10:29,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 12:10:30,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:30,162 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:30,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:30,163 INFO L85 PathProgramCache]: Analyzing trace with hash 407044048, now seen corresponding path program 37 times [2022-12-14 12:10:30,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:30,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396255806] [2022-12-14 12:10:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:30,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:30,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:30,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396255806] [2022-12-14 12:10:30,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396255806] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:30,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569055802] [2022-12-14 12:10:30,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:30,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:30,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:30,737 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:30,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 12:10:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:30,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 12:10:30,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:30,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:31,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569055802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:31,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121108978] [2022-12-14 12:10:31,299 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:31,299 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:31,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:31,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:31,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:31,345 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:31,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18463#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:31,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:31,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:31,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 42 [2022-12-14 12:10:31,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774703008] [2022-12-14 12:10:31,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:31,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 12:10:31,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 12:10:31,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=1757, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 12:10:31,495 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:31,843 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2022-12-14 12:10:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 12:10:31,843 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 42 states have internal predecessors, (83), 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 81 [2022-12-14 12:10:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:31,844 INFO L225 Difference]: With dead ends: 146 [2022-12-14 12:10:31,844 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 12:10:31,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 196 SyntacticMatches, 40 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=959, Invalid=3597, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 12:10:31,844 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:31,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 191 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 12:10:31,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-12-14 12:10:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-12-14 12:10:31,854 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 81 [2022-12-14 12:10:31,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:31,854 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-12-14 12:10:31,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-12-14 12:10:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 12:10:31,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:31,855 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2022-12-14 12:10:31,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 12:10:32,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 12:10:32,056 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1477994843, now seen corresponding path program 38 times [2022-12-14 12:10:32,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:32,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963754859] [2022-12-14 12:10:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:32,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:32,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:32,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963754859] [2022-12-14 12:10:32,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963754859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:32,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607740283] [2022-12-14 12:10:32,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:32,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:32,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:32,441 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:32,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 12:10:32,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-12-14 12:10:32,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:32,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 12:10:32,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:32,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:33,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607740283] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:33,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [515612901] [2022-12-14 12:10:33,014 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:33,014 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:33,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:33,014 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:33,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:33,055 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:33,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19410#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:33,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:33,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:33,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2022-12-14 12:10:33,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34543714] [2022-12-14 12:10:33,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:33,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 12:10:33,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:33,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 12:10:33,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2022-12-14 12:10:33,178 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:33,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:33,456 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2022-12-14 12:10:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 12:10:33,456 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 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 82 [2022-12-14 12:10:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:33,456 INFO L225 Difference]: With dead ends: 94 [2022-12-14 12:10:33,456 INFO L226 Difference]: Without dead ends: 92 [2022-12-14 12:10:33,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 40 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=835, Invalid=1921, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 12:10:33,457 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 48 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:33,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 12 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-14 12:10:33,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2022-12-14 12:10:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-12-14 12:10:33,467 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 82 [2022-12-14 12:10:33,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:33,468 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-12-14 12:10:33,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-12-14 12:10:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 12:10:33,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:33,468 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1] [2022-12-14 12:10:33,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 12:10:33,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 12:10:33,669 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1065171060, now seen corresponding path program 39 times [2022-12-14 12:10:33,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:33,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266756670] [2022-12-14 12:10:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:33,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:34,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:34,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266756670] [2022-12-14 12:10:34,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266756670] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:34,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205205228] [2022-12-14 12:10:34,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:34,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:34,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:34,281 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:34,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 12:10:34,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:34,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:34,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 12:10:34,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:34,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:34,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205205228] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:34,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715786295] [2022-12-14 12:10:34,796 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:34,796 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:34,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:34,797 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:34,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:34,840 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:35,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20315#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:35,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:35,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:35,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2022-12-14 12:10:35,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803363250] [2022-12-14 12:10:35,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:35,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 12:10:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 12:10:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1906, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 12:10:35,096 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:35,427 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2022-12-14 12:10:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 12:10:35,428 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 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 85 [2022-12-14 12:10:35,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:35,428 INFO L225 Difference]: With dead ends: 153 [2022-12-14 12:10:35,428 INFO L226 Difference]: Without dead ends: 87 [2022-12-14 12:10:35,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 206 SyntacticMatches, 42 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1048, Invalid=3922, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 12:10:35,429 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:35,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 125 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:35,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-14 12:10:35,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-12-14 12:10:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-12-14 12:10:35,448 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 85 [2022-12-14 12:10:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:35,448 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-12-14 12:10:35,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:35,448 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-12-14 12:10:35,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 12:10:35,448 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:35,449 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2022-12-14 12:10:35,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 12:10:35,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:35,650 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:35,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1432331063, now seen corresponding path program 40 times [2022-12-14 12:10:35,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:35,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450272626] [2022-12-14 12:10:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:35,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:36,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:36,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450272626] [2022-12-14 12:10:36,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450272626] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:36,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426268952] [2022-12-14 12:10:36,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:36,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:36,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:36,018 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:36,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 12:10:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:36,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 12:10:36,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:36,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:36,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426268952] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:36,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [258851430] [2022-12-14 12:10:36,488 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:36,488 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:36,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:36,489 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:36,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:36,534 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:36,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21308#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:36,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:36,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:36,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-12-14 12:10:36,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398156248] [2022-12-14 12:10:36,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:36,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 12:10:36,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:36,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 12:10:36,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2022-12-14 12:10:36,762 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:37,029 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2022-12-14 12:10:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 12:10:37,029 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-12-14 12:10:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:37,030 INFO L225 Difference]: With dead ends: 98 [2022-12-14 12:10:37,030 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 12:10:37,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 228 SyntacticMatches, 42 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=906, Invalid=2064, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 12:10:37,031 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 94 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:37,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 17 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 12:10:37,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2022-12-14 12:10:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:37,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-12-14 12:10:37,044 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2022-12-14 12:10:37,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:37,044 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-12-14 12:10:37,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-12-14 12:10:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 12:10:37,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:37,044 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1] [2022-12-14 12:10:37,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 12:10:37,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-14 12:10:37,245 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:37,245 INFO L85 PathProgramCache]: Analyzing trace with hash -69791792, now seen corresponding path program 41 times [2022-12-14 12:10:37,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:37,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388902353] [2022-12-14 12:10:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:37,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:37,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:37,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388902353] [2022-12-14 12:10:37,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388902353] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874408415] [2022-12-14 12:10:37,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:37,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:37,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:37,836 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:37,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 12:10:37,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-12-14 12:10:37,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:37,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 12:10:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:38,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:38,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874408415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:38,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1571334358] [2022-12-14 12:10:38,453 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:38,453 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:38,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:38,453 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:38,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:38,497 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:38,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22255#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:38,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:38,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:38,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 46 [2022-12-14 12:10:38,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896385536] [2022-12-14 12:10:38,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:38,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 12:10:38,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 12:10:38,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=2061, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 12:10:38,816 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:39,255 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2022-12-14 12:10:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 12:10:39,255 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 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 89 [2022-12-14 12:10:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:39,256 INFO L225 Difference]: With dead ends: 160 [2022-12-14 12:10:39,256 INFO L226 Difference]: Without dead ends: 91 [2022-12-14 12:10:39,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 216 SyntacticMatches, 44 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1141, Invalid=4261, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 12:10:39,257 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:39,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 148 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-14 12:10:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-12-14 12:10:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-12-14 12:10:39,277 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 89 [2022-12-14 12:10:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:39,277 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-12-14 12:10:39,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-12-14 12:10:39,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 12:10:39,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:39,278 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2022-12-14 12:10:39,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 12:10:39,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:39,479 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:39,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:39,480 INFO L85 PathProgramCache]: Analyzing trace with hash 494272933, now seen corresponding path program 42 times [2022-12-14 12:10:39,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:39,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095395762] [2022-12-14 12:10:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:39,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:39,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:39,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095395762] [2022-12-14 12:10:39,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095395762] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:39,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468507652] [2022-12-14 12:10:39,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:39,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:39,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:39,871 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:39,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 12:10:39,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:39,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:39,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 12:10:39,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:39,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:40,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468507652] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:40,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1580631023] [2022-12-14 12:10:40,331 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:40,331 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:40,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:40,331 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:40,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:40,371 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:40,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23294#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:40,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:40,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:40,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2022-12-14 12:10:40,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031721913] [2022-12-14 12:10:40,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:40,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 12:10:40,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 12:10:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 12:10:40,589 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:40,868 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2022-12-14 12:10:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 12:10:40,868 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 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 90 [2022-12-14 12:10:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:40,869 INFO L225 Difference]: With dead ends: 102 [2022-12-14 12:10:40,869 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 12:10:40,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 239 SyntacticMatches, 44 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=980, Invalid=2212, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 12:10:40,869 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 52 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:40,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 16 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:40,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 12:10:40,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2022-12-14 12:10:40,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:40,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-12-14 12:10:40,883 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 90 [2022-12-14 12:10:40,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:40,883 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-12-14 12:10:40,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:40,884 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-12-14 12:10:40,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 12:10:40,884 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:40,884 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1] [2022-12-14 12:10:40,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 12:10:41,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-14 12:10:41,085 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:41,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:41,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1741876596, now seen corresponding path program 43 times [2022-12-14 12:10:41,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:41,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459592757] [2022-12-14 12:10:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:41,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:41,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:41,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459592757] [2022-12-14 12:10:41,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459592757] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:41,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396554747] [2022-12-14 12:10:41,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:41,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:41,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:41,665 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:41,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 12:10:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:41,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 12:10:41,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:41,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:42,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396554747] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:42,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162558909] [2022-12-14 12:10:42,245 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:42,245 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:42,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:42,245 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:42,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:42,289 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:42,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24283#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:42,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:42,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:42,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 48 [2022-12-14 12:10:42,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686258493] [2022-12-14 12:10:42,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:42,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 12:10:42,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:42,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 12:10:42,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=2222, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 12:10:42,511 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:42,920 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2022-12-14 12:10:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 12:10:42,920 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 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 93 [2022-12-14 12:10:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:42,921 INFO L225 Difference]: With dead ends: 167 [2022-12-14 12:10:42,921 INFO L226 Difference]: Without dead ends: 95 [2022-12-14 12:10:42,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 226 SyntacticMatches, 46 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1238, Invalid=4614, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 12:10:42,922 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:42,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 220 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-14 12:10:42,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-12-14 12:10:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-12-14 12:10:42,934 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 93 [2022-12-14 12:10:42,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:42,934 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-12-14 12:10:42,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:42,934 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-12-14 12:10:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 12:10:42,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:42,935 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2022-12-14 12:10:42,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 12:10:43,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:43,135 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash -632623927, now seen corresponding path program 44 times [2022-12-14 12:10:43,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986066041] [2022-12-14 12:10:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:43,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:43,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986066041] [2022-12-14 12:10:43,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986066041] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:43,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299850873] [2022-12-14 12:10:43,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:43,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:43,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:43,511 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:43,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 12:10:43,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-12-14 12:10:43,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 12:10:43,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:43,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:43,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299850873] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:43,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [902884072] [2022-12-14 12:10:43,976 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:43,976 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:43,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:43,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:43,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:44,021 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:44,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25368#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:44,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:44,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:44,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2022-12-14 12:10:44,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087721709] [2022-12-14 12:10:44,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:44,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 12:10:44,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:44,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 12:10:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=768, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 12:10:44,131 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:44,400 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2022-12-14 12:10:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 12:10:44,400 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 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 94 [2022-12-14 12:10:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:44,401 INFO L225 Difference]: With dead ends: 106 [2022-12-14 12:10:44,401 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 12:10:44,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 250 SyntacticMatches, 46 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1057, Invalid=2365, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 12:10:44,401 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:44,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 14 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 12:10:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2022-12-14 12:10:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-12-14 12:10:44,415 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 94 [2022-12-14 12:10:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:44,415 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-12-14 12:10:44,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-12-14 12:10:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 12:10:44,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:44,415 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1] [2022-12-14 12:10:44,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-14 12:10:44,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:44,616 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:44,617 INFO L85 PathProgramCache]: Analyzing trace with hash -178094128, now seen corresponding path program 45 times [2022-12-14 12:10:44,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:44,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084811701] [2022-12-14 12:10:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:45,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:45,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084811701] [2022-12-14 12:10:45,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084811701] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:45,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799377186] [2022-12-14 12:10:45,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:45,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:45,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:45,247 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:45,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 12:10:45,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:45,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:45,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 12:10:45,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:45,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:45,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799377186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:45,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1022675597] [2022-12-14 12:10:45,841 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:45,841 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:45,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:45,841 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:45,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:45,885 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:46,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26399#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:46,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:46,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:46,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 50 [2022-12-14 12:10:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612549955] [2022-12-14 12:10:46,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:46,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 12:10:46,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:46,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 12:10:46,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=2389, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 12:10:46,050 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:46,478 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2022-12-14 12:10:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 12:10:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 50 states have internal predecessors, (99), 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 97 [2022-12-14 12:10:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:46,479 INFO L225 Difference]: With dead ends: 174 [2022-12-14 12:10:46,479 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 12:10:46,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 236 SyntacticMatches, 48 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1339, Invalid=4981, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 12:10:46,479 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:46,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 226 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 12:10:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-12-14 12:10:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-12-14 12:10:46,493 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 97 [2022-12-14 12:10:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:46,493 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-12-14 12:10:46,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:46,493 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-12-14 12:10:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 12:10:46,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:46,493 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2022-12-14 12:10:46,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-14 12:10:46,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-14 12:10:46,694 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:46,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:46,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1651559589, now seen corresponding path program 46 times [2022-12-14 12:10:46,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:46,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356781560] [2022-12-14 12:10:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:46,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:47,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:47,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356781560] [2022-12-14 12:10:47,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356781560] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:47,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847587596] [2022-12-14 12:10:47,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:47,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:47,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:47,175 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:47,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 12:10:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:47,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 12:10:47,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:47,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:47,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847587596] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:47,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [989843550] [2022-12-14 12:10:47,788 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:47,788 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:47,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:47,788 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:47,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:47,836 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:48,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27530#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:48,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:48,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:48,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 29 [2022-12-14 12:10:48,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544649771] [2022-12-14 12:10:48,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:48,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 12:10:48,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:48,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 12:10:48,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=810, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 12:10:48,074 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 30 states, 30 states have (on average 3.4) internal successors, (102), 29 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:48,385 INFO L93 Difference]: Finished difference Result 110 states and 111 transitions. [2022-12-14 12:10:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 12:10:48,385 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.4) internal successors, (102), 29 states have internal predecessors, (102), 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 98 [2022-12-14 12:10:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:48,386 INFO L225 Difference]: With dead ends: 110 [2022-12-14 12:10:48,386 INFO L226 Difference]: Without dead ends: 108 [2022-12-14 12:10:48,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 261 SyntacticMatches, 48 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1137, Invalid=2523, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 12:10:48,389 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 58 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:48,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 16 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:48,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-14 12:10:48,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2022-12-14 12:10:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-12-14 12:10:48,403 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2022-12-14 12:10:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:48,403 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-12-14 12:10:48,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.4) internal successors, (102), 29 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-12-14 12:10:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 12:10:48,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:48,404 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1] [2022-12-14 12:10:48,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 12:10:48,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-14 12:10:48,604 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:48,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1528806796, now seen corresponding path program 47 times [2022-12-14 12:10:48,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:48,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425630608] [2022-12-14 12:10:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:48,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:49,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:49,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425630608] [2022-12-14 12:10:49,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425630608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:49,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710727147] [2022-12-14 12:10:49,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:49,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:49,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:49,311 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:49,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-14 12:10:49,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-12-14 12:10:49,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:49,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 12:10:49,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:49,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:50,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710727147] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:50,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651541126] [2022-12-14 12:10:50,144 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:50,144 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:50,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:50,144 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:50,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:50,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:50,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28603#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:50,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:50,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:50,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 52 [2022-12-14 12:10:50,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535061949] [2022-12-14 12:10:50,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:50,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 12:10:50,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:50,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 12:10:50,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=2562, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 12:10:50,391 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 53 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:51,003 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2022-12-14 12:10:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 12:10:51,003 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 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 101 [2022-12-14 12:10:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:51,004 INFO L225 Difference]: With dead ends: 181 [2022-12-14 12:10:51,004 INFO L226 Difference]: Without dead ends: 103 [2022-12-14 12:10:51,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 246 SyntacticMatches, 50 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1444, Invalid=5362, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 12:10:51,005 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:51,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 212 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:10:51,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-14 12:10:51,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-12-14 12:10:51,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:51,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-12-14 12:10:51,030 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 101 [2022-12-14 12:10:51,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:51,030 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-12-14 12:10:51,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-12-14 12:10:51,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 12:10:51,031 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:51,031 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2022-12-14 12:10:51,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-12-14 12:10:51,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:51,231 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:51,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:51,231 INFO L85 PathProgramCache]: Analyzing trace with hash 362945737, now seen corresponding path program 48 times [2022-12-14 12:10:51,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:51,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483577562] [2022-12-14 12:10:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:51,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:51,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:51,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483577562] [2022-12-14 12:10:51,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483577562] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:51,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237096873] [2022-12-14 12:10:51,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:51,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:51,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:51,737 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:51,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 12:10:51,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:51,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:51,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 12:10:51,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:51,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:52,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237096873] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:52,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857905776] [2022-12-14 12:10:52,285 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:52,285 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:52,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:52,285 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:52,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:52,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:52,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29780#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:52,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:52,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:52,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2022-12-14 12:10:52,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986912350] [2022-12-14 12:10:52,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:52,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 12:10:52,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:52,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 12:10:52,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 12:10:52,519 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 31 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:52,889 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2022-12-14 12:10:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-14 12:10:52,889 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 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 102 [2022-12-14 12:10:52,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:52,890 INFO L225 Difference]: With dead ends: 114 [2022-12-14 12:10:52,890 INFO L226 Difference]: Without dead ends: 112 [2022-12-14 12:10:52,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 272 SyntacticMatches, 50 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1220, Invalid=2686, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 12:10:52,891 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 60 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:52,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 16 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-14 12:10:52,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2022-12-14 12:10:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-12-14 12:10:52,908 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 102 [2022-12-14 12:10:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:52,908 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-12-14 12:10:52,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-12-14 12:10:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 12:10:52,908 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:52,909 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1] [2022-12-14 12:10:52,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-14 12:10:53,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-14 12:10:53,110 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:53,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2088587216, now seen corresponding path program 49 times [2022-12-14 12:10:53,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:53,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517421414] [2022-12-14 12:10:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:53,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:54,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:54,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517421414] [2022-12-14 12:10:54,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517421414] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:54,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273969693] [2022-12-14 12:10:54,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:54,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:54,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:54,031 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:54,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 12:10:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:54,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 12:10:54,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:54,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:54,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273969693] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:54,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451658359] [2022-12-14 12:10:54,864 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:54,864 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:54,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:54,864 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:54,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:54,924 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:55,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30895#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:55,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:55,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:55,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 54 [2022-12-14 12:10:55,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494661423] [2022-12-14 12:10:55,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:55,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 12:10:55,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 12:10:55,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=2741, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 12:10:55,231 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 55 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:55,846 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2022-12-14 12:10:55,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-14 12:10:55,847 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 54 states have internal predecessors, (107), 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 105 [2022-12-14 12:10:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:55,847 INFO L225 Difference]: With dead ends: 188 [2022-12-14 12:10:55,847 INFO L226 Difference]: Without dead ends: 107 [2022-12-14 12:10:55,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 256 SyntacticMatches, 52 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1553, Invalid=5757, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 12:10:55,848 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:55,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 230 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:55,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-14 12:10:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-12-14 12:10:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-12-14 12:10:55,875 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 105 [2022-12-14 12:10:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:55,875 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-12-14 12:10:55,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-12-14 12:10:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 12:10:55,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:55,876 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2022-12-14 12:10:55,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-14 12:10:56,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:56,077 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:56,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1452279899, now seen corresponding path program 50 times [2022-12-14 12:10:56,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:56,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094984642] [2022-12-14 12:10:56,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:56,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:56,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:56,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094984642] [2022-12-14 12:10:56,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094984642] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:56,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568581330] [2022-12-14 12:10:56,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:56,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:56,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:56,602 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:56,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-14 12:10:56,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-12-14 12:10:56,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:56,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 12:10:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:56,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:57,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568581330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:57,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1988179059] [2022-12-14 12:10:57,289 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:57,289 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:57,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:57,290 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:57,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:57,331 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:57,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32118#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:57,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:57,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:57,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2022-12-14 12:10:57,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772036110] [2022-12-14 12:10:57,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:57,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 12:10:57,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:57,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 12:10:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 12:10:57,624 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 32 states, 32 states have (on average 3.4375) internal successors, (110), 31 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:57,967 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2022-12-14 12:10:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-14 12:10:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 31 states have internal predecessors, (110), 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 106 [2022-12-14 12:10:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:57,969 INFO L225 Difference]: With dead ends: 118 [2022-12-14 12:10:57,969 INFO L226 Difference]: Without dead ends: 116 [2022-12-14 12:10:57,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 283 SyntacticMatches, 52 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1306, Invalid=2854, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 12:10:57,969 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 112 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:57,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 17 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:10:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-12-14 12:10:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2022-12-14 12:10:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-12-14 12:10:57,986 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 106 [2022-12-14 12:10:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:57,986 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-12-14 12:10:57,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 31 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-12-14 12:10:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 12:10:57,987 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:57,987 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1] [2022-12-14 12:10:57,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-12-14 12:10:58,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:58,188 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:10:58,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:58,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1660078220, now seen corresponding path program 51 times [2022-12-14 12:10:58,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:58,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184513982] [2022-12-14 12:10:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:58,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:58,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:58,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184513982] [2022-12-14 12:10:58,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184513982] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:58,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669544312] [2022-12-14 12:10:58,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:58,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:58,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:58,985 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:58,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 12:10:59,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:59,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:59,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 12:10:59,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:59,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:59,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669544312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:59,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111226918] [2022-12-14 12:10:59,657 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:10:59,657 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:59,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:59,657 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:59,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:59,704 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:59,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33275#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:10:59,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:59,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:59,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 56 [2022-12-14 12:10:59,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685476199] [2022-12-14 12:10:59,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:59,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 12:10:59,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:59,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 12:10:59,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=856, Invalid=2926, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 12:10:59,938 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 57 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:00,574 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2022-12-14 12:11:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 12:11:00,574 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-12-14 12:11:00,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:00,575 INFO L225 Difference]: With dead ends: 195 [2022-12-14 12:11:00,575 INFO L226 Difference]: Without dead ends: 111 [2022-12-14 12:11:00,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 266 SyntacticMatches, 54 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3015 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1666, Invalid=6166, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 12:11:00,576 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:00,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 151 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-14 12:11:00,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-12-14 12:11:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-12-14 12:11:00,593 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 109 [2022-12-14 12:11:00,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:00,593 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-12-14 12:11:00,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:00,594 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-12-14 12:11:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 12:11:00,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:00,594 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2022-12-14 12:11:00,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 12:11:00,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-12-14 12:11:00,795 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:00,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1041099977, now seen corresponding path program 52 times [2022-12-14 12:11:00,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:00,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384616347] [2022-12-14 12:11:00,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:00,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:01,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:01,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384616347] [2022-12-14 12:11:01,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384616347] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:01,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730394438] [2022-12-14 12:11:01,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:11:01,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:01,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:01,385 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:01,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 12:11:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 12:11:01,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:01,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:01,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730394438] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:01,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225442802] [2022-12-14 12:11:01,919 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:01,919 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:01,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:01,919 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:01,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:01,958 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:02,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34544#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:02,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:02,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:02,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 32 [2022-12-14 12:11:02,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620454116] [2022-12-14 12:11:02,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:02,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 12:11:02,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:02,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 12:11:02,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=942, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 12:11:02,162 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:02,466 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2022-12-14 12:11:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 12:11:02,466 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 32 states have internal predecessors, (114), 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 110 [2022-12-14 12:11:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:02,467 INFO L225 Difference]: With dead ends: 122 [2022-12-14 12:11:02,467 INFO L226 Difference]: Without dead ends: 120 [2022-12-14 12:11:02,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 294 SyntacticMatches, 54 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1395, Invalid=3027, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 12:11:02,467 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:02,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 14 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:02,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-14 12:11:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2022-12-14 12:11:02,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-12-14 12:11:02,487 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 110 [2022-12-14 12:11:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:02,487 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-12-14 12:11:02,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-12-14 12:11:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 12:11:02,488 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:02,488 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1] [2022-12-14 12:11:02,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-14 12:11:02,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:02,689 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1455390672, now seen corresponding path program 53 times [2022-12-14 12:11:02,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:02,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116268525] [2022-12-14 12:11:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:02,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:03,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:03,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116268525] [2022-12-14 12:11:03,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116268525] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:03,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619480712] [2022-12-14 12:11:03,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:11:03,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:03,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:03,508 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:03,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-14 12:11:03,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-12-14 12:11:03,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:03,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 12:11:03,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:03,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:04,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619480712] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:04,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [822314708] [2022-12-14 12:11:04,410 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:04,410 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:04,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:04,411 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:04,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:04,456 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:04,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35743#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:04,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:04,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:04,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 58 [2022-12-14 12:11:04,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813784078] [2022-12-14 12:11:04,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:04,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 12:11:04,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:04,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 12:11:04,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=3117, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 12:11:04,762 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 59 states, 59 states have (on average 1.9491525423728813) internal successors, (115), 58 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:05,407 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2022-12-14 12:11:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 12:11:05,408 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9491525423728813) internal successors, (115), 58 states have internal predecessors, (115), 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 113 [2022-12-14 12:11:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:05,408 INFO L225 Difference]: With dead ends: 202 [2022-12-14 12:11:05,408 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 12:11:05,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 276 SyntacticMatches, 56 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3225 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1783, Invalid=6589, Unknown=0, NotChecked=0, Total=8372 [2022-12-14 12:11:05,409 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:05,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 220 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 12:11:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-12-14 12:11:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-12-14 12:11:05,427 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 113 [2022-12-14 12:11:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:05,427 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-12-14 12:11:05,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9491525423728813) internal successors, (115), 58 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-12-14 12:11:05,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 12:11:05,427 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:05,427 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2022-12-14 12:11:05,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-12-14 12:11:05,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-14 12:11:05,628 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:05,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1930134181, now seen corresponding path program 54 times [2022-12-14 12:11:05,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:05,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444039094] [2022-12-14 12:11:05,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:05,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:06,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444039094] [2022-12-14 12:11:06,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444039094] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326674751] [2022-12-14 12:11:06,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:11:06,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:06,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:06,245 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:06,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 12:11:06,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:11:06,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:06,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 12:11:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:06,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:07,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326674751] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:07,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18922099] [2022-12-14 12:11:07,024 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:07,024 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:07,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:07,025 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:07,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:07,084 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:07,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37058#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:07,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:07,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:07,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2022-12-14 12:11:07,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033625587] [2022-12-14 12:11:07,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:07,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 12:11:07,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:07,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 12:11:07,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=988, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 12:11:07,320 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:07,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:07,755 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2022-12-14 12:11:07,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-14 12:11:07,755 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 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 114 [2022-12-14 12:11:07,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:07,756 INFO L225 Difference]: With dead ends: 126 [2022-12-14 12:11:07,756 INFO L226 Difference]: Without dead ends: 124 [2022-12-14 12:11:07,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 305 SyntacticMatches, 56 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1487, Invalid=3205, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 12:11:07,756 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 120 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:07,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 13 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-12-14 12:11:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2022-12-14 12:11:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-12-14 12:11:07,779 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 114 [2022-12-14 12:11:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:07,780 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-12-14 12:11:07,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-12-14 12:11:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 12:11:07,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:07,780 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1] [2022-12-14 12:11:07,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-12-14 12:11:07,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:07,981 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:07,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash -389952396, now seen corresponding path program 55 times [2022-12-14 12:11:07,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:07,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871921463] [2022-12-14 12:11:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:07,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:09,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:09,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871921463] [2022-12-14 12:11:09,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871921463] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:09,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316230326] [2022-12-14 12:11:09,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:11:09,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:09,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:09,104 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:09,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 12:11:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:09,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 12:11:09,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:09,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:09,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316230326] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:09,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266710142] [2022-12-14 12:11:09,916 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:09,916 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:09,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:09,916 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:09,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:09,957 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:10,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38299#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:10,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:10,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:10,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 60 [2022-12-14 12:11:10,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760504232] [2022-12-14 12:11:10,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:10,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-14 12:11:10,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-14 12:11:10,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=3314, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 12:11:10,228 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:10,831 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2022-12-14 12:11:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 12:11:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 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 117 [2022-12-14 12:11:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:10,832 INFO L225 Difference]: With dead ends: 209 [2022-12-14 12:11:10,832 INFO L226 Difference]: Without dead ends: 119 [2022-12-14 12:11:10,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 286 SyntacticMatches, 58 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3442 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1904, Invalid=7026, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 12:11:10,833 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:10,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 233 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:10,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-14 12:11:10,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-12-14 12:11:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-12-14 12:11:10,857 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 117 [2022-12-14 12:11:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:10,857 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-12-14 12:11:10,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-12-14 12:11:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 12:11:10,858 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:10,858 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2022-12-14 12:11:10,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-14 12:11:11,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:11,058 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash 653679817, now seen corresponding path program 56 times [2022-12-14 12:11:11,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:11,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785231376] [2022-12-14 12:11:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:11,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:11,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:11,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785231376] [2022-12-14 12:11:11,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785231376] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:11,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694851822] [2022-12-14 12:11:11,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:11:11,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:11,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:11,729 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:11,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-14 12:11:11,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2022-12-14 12:11:11,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:11,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 12:11:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:11,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:12,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694851822] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:12,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1434450822] [2022-12-14 12:11:12,573 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:12,573 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:12,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:12,573 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:12,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:12,615 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:12,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39660#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:12,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:12,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:12,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2022-12-14 12:11:12,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549186011] [2022-12-14 12:11:12,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:12,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 12:11:12,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:12,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 12:11:12,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 12:11:12,742 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:13,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:13,086 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2022-12-14 12:11:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-14 12:11:13,087 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 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 118 [2022-12-14 12:11:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:13,087 INFO L225 Difference]: With dead ends: 130 [2022-12-14 12:11:13,087 INFO L226 Difference]: Without dead ends: 128 [2022-12-14 12:11:13,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 316 SyntacticMatches, 58 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1582, Invalid=3388, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 12:11:13,088 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 66 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:13,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 18 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-12-14 12:11:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2022-12-14 12:11:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-12-14 12:11:13,109 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 118 [2022-12-14 12:11:13,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:13,109 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-12-14 12:11:13,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-12-14 12:11:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 12:11:13,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:13,110 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1] [2022-12-14 12:11:13,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-12-14 12:11:13,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-14 12:11:13,311 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:13,312 INFO L85 PathProgramCache]: Analyzing trace with hash 398528464, now seen corresponding path program 57 times [2022-12-14 12:11:13,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:13,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392700768] [2022-12-14 12:11:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:13,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:14,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:14,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392700768] [2022-12-14 12:11:14,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392700768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:14,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11569424] [2022-12-14 12:11:14,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:11:14,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:14,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:14,254 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:14,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 12:11:14,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:11:14,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:14,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 12:11:14,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:14,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:15,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11569424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:15,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1748080222] [2022-12-14 12:11:15,107 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:15,107 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:15,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:15,107 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:15,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:15,146 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:15,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40943#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:15,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:15,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:15,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 62 [2022-12-14 12:11:15,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891978611] [2022-12-14 12:11:15,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:15,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-14 12:11:15,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:15,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-14 12:11:15,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=3517, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 12:11:15,302 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:15,897 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2022-12-14 12:11:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-14 12:11:15,897 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-12-14 12:11:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:15,898 INFO L225 Difference]: With dead ends: 216 [2022-12-14 12:11:15,898 INFO L226 Difference]: Without dead ends: 123 [2022-12-14 12:11:15,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 296 SyntacticMatches, 60 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2029, Invalid=7477, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 12:11:15,899 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:15,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 209 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-12-14 12:11:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-12-14 12:11:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-12-14 12:11:15,921 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 121 [2022-12-14 12:11:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:15,921 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-12-14 12:11:15,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-12-14 12:11:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 12:11:15,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:15,922 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2022-12-14 12:11:15,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-14 12:11:16,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-14 12:11:16,123 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:16,124 INFO L85 PathProgramCache]: Analyzing trace with hash 232484261, now seen corresponding path program 58 times [2022-12-14 12:11:16,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:16,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984684270] [2022-12-14 12:11:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:16,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:16,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:16,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984684270] [2022-12-14 12:11:16,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984684270] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:16,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152793330] [2022-12-14 12:11:16,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:11:16,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:16,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:16,818 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:16,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 12:11:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:16,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 12:11:16,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:16,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:17,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152793330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:17,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240001390] [2022-12-14 12:11:17,616 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:17,616 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:17,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:17,616 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:17,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:17,655 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:17,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42350#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:17,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:17,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:17,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 35 [2022-12-14 12:11:17,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796907910] [2022-12-14 12:11:17,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:17,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 12:11:17,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:17,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 12:11:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=1083, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 12:11:17,817 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:18,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:18,191 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2022-12-14 12:11:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 12:11:18,191 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 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 122 [2022-12-14 12:11:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:18,191 INFO L225 Difference]: With dead ends: 134 [2022-12-14 12:11:18,191 INFO L226 Difference]: Without dead ends: 132 [2022-12-14 12:11:18,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 327 SyntacticMatches, 60 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1680, Invalid=3576, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 12:11:18,192 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 128 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:18,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 11 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-14 12:11:18,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-12-14 12:11:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-12-14 12:11:18,212 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 122 [2022-12-14 12:11:18,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:18,213 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-12-14 12:11:18,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:18,213 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-12-14 12:11:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 12:11:18,213 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:18,213 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1] [2022-12-14 12:11:18,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-14 12:11:18,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-14 12:11:18,414 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:18,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1838808716, now seen corresponding path program 59 times [2022-12-14 12:11:18,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:18,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436602581] [2022-12-14 12:11:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:18,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:19,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:19,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436602581] [2022-12-14 12:11:19,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436602581] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:19,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971011180] [2022-12-14 12:11:19,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:11:19,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:19,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:19,621 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:19,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-14 12:11:19,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-12-14 12:11:19,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:19,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 12:11:19,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:19,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:20,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971011180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:20,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908712618] [2022-12-14 12:11:20,698 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:20,698 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:20,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:20,698 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:20,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:20,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:20,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43675#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:20,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:20,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:20,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 64 [2022-12-14 12:11:20,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926212810] [2022-12-14 12:11:20,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:20,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 12:11:20,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 12:11:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1104, Invalid=3726, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 12:11:20,951 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 65 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:21,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:21,715 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2022-12-14 12:11:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-14 12:11:21,715 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 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 125 [2022-12-14 12:11:21,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:21,716 INFO L225 Difference]: With dead ends: 223 [2022-12-14 12:11:21,716 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 12:11:21,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 306 SyntacticMatches, 62 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3897 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2158, Invalid=7942, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 12:11:21,717 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:21,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 271 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:11:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 12:11:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-12-14 12:11:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-12-14 12:11:21,737 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 125 [2022-12-14 12:11:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:21,737 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-12-14 12:11:21,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-12-14 12:11:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 12:11:21,738 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:21,738 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2022-12-14 12:11:21,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-14 12:11:21,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:21,939 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash 365128905, now seen corresponding path program 60 times [2022-12-14 12:11:21,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:21,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585951435] [2022-12-14 12:11:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:21,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:22,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:22,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585951435] [2022-12-14 12:11:22,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585951435] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:22,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023277542] [2022-12-14 12:11:22,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:11:22,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:22,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:22,681 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:22,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 12:11:22,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:11:22,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:22,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 12:11:22,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:22,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:23,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023277542] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:23,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [248821199] [2022-12-14 12:11:23,369 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:23,369 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:23,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:23,369 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:23,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:23,410 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:23,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45128#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:23,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:23,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:23,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2022-12-14 12:11:23,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8627444] [2022-12-14 12:11:23,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:23,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 12:11:23,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:23,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 12:11:23,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=1132, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 12:11:23,656 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 37 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:24,034 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2022-12-14 12:11:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-14 12:11:24,035 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 36 states have internal predecessors, (130), 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 126 [2022-12-14 12:11:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:24,035 INFO L225 Difference]: With dead ends: 138 [2022-12-14 12:11:24,035 INFO L226 Difference]: Without dead ends: 136 [2022-12-14 12:11:24,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 338 SyntacticMatches, 62 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1781, Invalid=3769, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 12:11:24,036 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 134 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:24,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 17 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-14 12:11:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2022-12-14 12:11:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-12-14 12:11:24,058 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 126 [2022-12-14 12:11:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:24,058 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-12-14 12:11:24,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-12-14 12:11:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 12:11:24,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:24,058 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1] [2022-12-14 12:11:24,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-14 12:11:24,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:24,259 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:24,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:24,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1592131632, now seen corresponding path program 61 times [2022-12-14 12:11:24,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:24,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683035468] [2022-12-14 12:11:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:24,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:25,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683035468] [2022-12-14 12:11:25,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683035468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290653560] [2022-12-14 12:11:25,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:11:25,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:25,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:25,363 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:25,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-14 12:11:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:25,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 12:11:25,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:25,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:26,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290653560] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:26,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [565631948] [2022-12-14 12:11:26,334 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:26,334 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:26,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:26,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:26,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:26,385 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:26,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46495#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:26,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:26,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:26,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 66 [2022-12-14 12:11:26,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746422933] [2022-12-14 12:11:26,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:26,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 12:11:26,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:26,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 12:11:26,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1171, Invalid=3941, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 12:11:26,632 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 67 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:27,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:27,209 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2022-12-14 12:11:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-14 12:11:27,209 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 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 129 [2022-12-14 12:11:27,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:27,210 INFO L225 Difference]: With dead ends: 230 [2022-12-14 12:11:27,210 INFO L226 Difference]: Without dead ends: 131 [2022-12-14 12:11:27,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 316 SyntacticMatches, 64 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4135 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2291, Invalid=8421, Unknown=0, NotChecked=0, Total=10712 [2022-12-14 12:11:27,210 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:27,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 158 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:27,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-12-14 12:11:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-12-14 12:11:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-12-14 12:11:27,232 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 129 [2022-12-14 12:11:27,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:27,233 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-12-14 12:11:27,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-12-14 12:11:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 12:11:27,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:27,233 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2022-12-14 12:11:27,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-12-14 12:11:27,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:27,434 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:27,435 INFO L85 PathProgramCache]: Analyzing trace with hash 376944805, now seen corresponding path program 62 times [2022-12-14 12:11:27,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:27,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830567578] [2022-12-14 12:11:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:27,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:28,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:28,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830567578] [2022-12-14 12:11:28,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830567578] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:28,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067626696] [2022-12-14 12:11:28,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:11:28,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:28,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:28,206 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:28,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-14 12:11:28,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2022-12-14 12:11:28,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:28,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 12:11:28,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:28,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:29,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067626696] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:29,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1276396885] [2022-12-14 12:11:29,031 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:29,031 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:29,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:29,031 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:29,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:29,068 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:29,232 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47994#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:29,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:29,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:29,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2022-12-14 12:11:29,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744883501] [2022-12-14 12:11:29,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:29,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 12:11:29,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:29,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 12:11:29,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1182, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 12:11:29,234 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 37 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:29,740 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2022-12-14 12:11:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 12:11:29,741 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 37 states have internal predecessors, (134), 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 130 [2022-12-14 12:11:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:29,742 INFO L225 Difference]: With dead ends: 142 [2022-12-14 12:11:29,742 INFO L226 Difference]: Without dead ends: 140 [2022-12-14 12:11:29,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 349 SyntacticMatches, 64 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1885, Invalid=3967, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 12:11:29,742 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 138 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:29,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 23 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-14 12:11:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2022-12-14 12:11:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-12-14 12:11:29,769 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2022-12-14 12:11:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:29,769 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-12-14 12:11:29,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 37 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-12-14 12:11:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 12:11:29,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:29,770 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1] [2022-12-14 12:11:29,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-14 12:11:29,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-12-14 12:11:29,971 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1771973004, now seen corresponding path program 63 times [2022-12-14 12:11:29,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:29,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585713674] [2022-12-14 12:11:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:29,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:31,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585713674] [2022-12-14 12:11:31,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585713674] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605959915] [2022-12-14 12:11:31,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:11:31,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:31,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:31,183 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:31,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-14 12:11:31,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:11:31,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:31,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 12:11:31,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:31,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:32,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605959915] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:32,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487427832] [2022-12-14 12:11:32,210 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:32,210 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:32,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:32,211 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:32,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:32,251 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:32,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49403#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:32,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:32,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:32,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 68 [2022-12-14 12:11:32,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734207579] [2022-12-14 12:11:32,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:32,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-14 12:11:32,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-14 12:11:32,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1240, Invalid=4162, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 12:11:32,535 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 69 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:33,204 INFO L93 Difference]: Finished difference Result 237 states and 239 transitions. [2022-12-14 12:11:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-14 12:11:33,204 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 68 states have internal predecessors, (135), 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 133 [2022-12-14 12:11:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:33,205 INFO L225 Difference]: With dead ends: 237 [2022-12-14 12:11:33,205 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 12:11:33,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 326 SyntacticMatches, 66 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4380 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2428, Invalid=8914, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 12:11:33,206 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:33,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 225 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 12:11:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-12-14 12:11:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-12-14 12:11:33,229 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 133 [2022-12-14 12:11:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:33,229 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-12-14 12:11:33,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-12-14 12:11:33,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 12:11:33,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:33,230 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2022-12-14 12:11:33,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-14 12:11:33,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:33,431 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:33,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:33,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1105009865, now seen corresponding path program 64 times [2022-12-14 12:11:33,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:33,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619326001] [2022-12-14 12:11:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:33,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:34,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:34,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619326001] [2022-12-14 12:11:34,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619326001] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:34,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068108649] [2022-12-14 12:11:34,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:11:34,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:34,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:34,323 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:34,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-14 12:11:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:34,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-14 12:11:34,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:34,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:35,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068108649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:35,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [524307490] [2022-12-14 12:11:35,098 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:35,098 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:35,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:35,098 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:35,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:35,148 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:35,394 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50948#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:35,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:35,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:35,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 38 [2022-12-14 12:11:35,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913845155] [2022-12-14 12:11:35,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:35,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 12:11:35,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:35,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 12:11:35,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=1233, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:11:35,396 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 39 states, 39 states have (on average 3.5384615384615383) internal successors, (138), 38 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:35,815 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2022-12-14 12:11:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-14 12:11:35,816 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.5384615384615383) internal successors, (138), 38 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-12-14 12:11:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:35,817 INFO L225 Difference]: With dead ends: 146 [2022-12-14 12:11:35,817 INFO L226 Difference]: Without dead ends: 144 [2022-12-14 12:11:35,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 360 SyntacticMatches, 66 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1992, Invalid=4170, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 12:11:35,817 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 76 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:35,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 20 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-12-14 12:11:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2022-12-14 12:11:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-12-14 12:11:35,842 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 134 [2022-12-14 12:11:35,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:35,842 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-12-14 12:11:35,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.5384615384615383) internal successors, (138), 38 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-12-14 12:11:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:11:35,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:35,843 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1] [2022-12-14 12:11:35,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-14 12:11:36,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-12-14 12:11:36,044 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1570615344, now seen corresponding path program 65 times [2022-12-14 12:11:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:36,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554046295] [2022-12-14 12:11:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:37,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:37,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554046295] [2022-12-14 12:11:37,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554046295] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:37,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607882946] [2022-12-14 12:11:37,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:11:37,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:37,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:37,351 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:37,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-14 12:11:37,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-12-14 12:11:37,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:37,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 12:11:37,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:37,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:38,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607882946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:38,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133350273] [2022-12-14 12:11:38,745 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:38,745 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:38,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:38,745 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:38,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:38,785 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:39,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '52399#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:39,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:39,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:39,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 70 [2022-12-14 12:11:39,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902773666] [2022-12-14 12:11:39,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:39,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 12:11:39,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 12:11:39,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1311, Invalid=4389, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 12:11:39,158 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:40,064 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2022-12-14 12:11:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-14 12:11:40,064 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-12-14 12:11:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:40,065 INFO L225 Difference]: With dead ends: 244 [2022-12-14 12:11:40,065 INFO L226 Difference]: Without dead ends: 139 [2022-12-14 12:11:40,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 336 SyntacticMatches, 68 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4632 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2569, Invalid=9421, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 12:11:40,066 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:40,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 298 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:11:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-12-14 12:11:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-12-14 12:11:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-12-14 12:11:40,090 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 137 [2022-12-14 12:11:40,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:40,091 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-12-14 12:11:40,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:40,091 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-12-14 12:11:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 12:11:40,091 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:40,091 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2022-12-14 12:11:40,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-12-14 12:11:40,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:40,293 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:40,294 INFO L85 PathProgramCache]: Analyzing trace with hash -143105115, now seen corresponding path program 66 times [2022-12-14 12:11:40,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:40,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065294736] [2022-12-14 12:11:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:40,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:41,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:41,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065294736] [2022-12-14 12:11:41,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065294736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:41,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383974905] [2022-12-14 12:11:41,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:11:41,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:41,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:41,192 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:41,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-14 12:11:41,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:11:41,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-14 12:11:41,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:41,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:42,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383974905] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:42,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744463308] [2022-12-14 12:11:42,077 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:42,077 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:42,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:42,077 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:42,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:42,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:42,240 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '53990#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:42,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:42,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:42,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2022-12-14 12:11:42,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14169375] [2022-12-14 12:11:42,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:42,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 12:11:42,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 12:11:42,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=1285, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 12:11:42,242 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 40 states, 40 states have (on average 3.55) internal successors, (142), 39 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:42,718 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2022-12-14 12:11:42,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-14 12:11:42,718 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.55) internal successors, (142), 39 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2022-12-14 12:11:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:42,719 INFO L225 Difference]: With dead ends: 150 [2022-12-14 12:11:42,719 INFO L226 Difference]: Without dead ends: 148 [2022-12-14 12:11:42,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 371 SyntacticMatches, 68 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2102, Invalid=4378, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 12:11:42,720 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 144 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:42,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 19 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-14 12:11:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2022-12-14 12:11:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:42,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-12-14 12:11:42,753 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 138 [2022-12-14 12:11:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:42,753 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-12-14 12:11:42,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.55) internal successors, (142), 39 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-12-14 12:11:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 12:11:42,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:42,754 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1] [2022-12-14 12:11:42,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-12-14 12:11:42,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:42,955 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:42,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1662864244, now seen corresponding path program 67 times [2022-12-14 12:11:42,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:42,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890088027] [2022-12-14 12:11:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:42,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:44,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:44,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890088027] [2022-12-14 12:11:44,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890088027] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:44,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765408470] [2022-12-14 12:11:44,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:11:44,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:44,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:44,374 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:44,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-14 12:11:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:44,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-14 12:11:44,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:44,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:45,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765408470] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:45,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [441707917] [2022-12-14 12:11:45,613 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:45,613 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:45,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:45,613 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:45,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:45,653 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:45,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55483#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:45,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:45,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:45,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 72 [2022-12-14 12:11:45,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855358045] [2022-12-14 12:11:45,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:45,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 12:11:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 12:11:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=4622, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 12:11:45,840 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:46,846 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2022-12-14 12:11:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-14 12:11:46,846 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 72 states have internal predecessors, (143), 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 141 [2022-12-14 12:11:46,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:46,847 INFO L225 Difference]: With dead ends: 251 [2022-12-14 12:11:46,847 INFO L226 Difference]: Without dead ends: 143 [2022-12-14 12:11:46,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 346 SyntacticMatches, 70 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4891 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2714, Invalid=9942, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 12:11:46,848 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:46,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 385 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:11:46,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-14 12:11:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-12-14 12:11:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2022-12-14 12:11:46,875 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 141 [2022-12-14 12:11:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:46,876 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2022-12-14 12:11:46,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2022-12-14 12:11:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 12:11:46,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:46,876 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2022-12-14 12:11:46,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-14 12:11:47,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-12-14 12:11:47,077 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:47,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1420520649, now seen corresponding path program 68 times [2022-12-14 12:11:47,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:47,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67296427] [2022-12-14 12:11:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:47,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:48,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:48,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67296427] [2022-12-14 12:11:48,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67296427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:48,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260804140] [2022-12-14 12:11:48,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:11:48,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:48,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:48,028 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:48,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-12-14 12:11:48,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2022-12-14 12:11:48,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:48,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 12:11:48,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:48,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:49,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260804140] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:49,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [337028300] [2022-12-14 12:11:49,135 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:49,135 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:49,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:49,135 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:49,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:49,179 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:49,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '57120#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:49,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:49,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:49,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2022-12-14 12:11:49,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743242149] [2022-12-14 12:11:49,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:49,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 12:11:49,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:49,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 12:11:49,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=1338, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 12:11:49,362 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 41 states, 41 states have (on average 3.5609756097560976) internal successors, (146), 40 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:49,892 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2022-12-14 12:11:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-14 12:11:49,893 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5609756097560976) internal successors, (146), 40 states have internal predecessors, (146), 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 142 [2022-12-14 12:11:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:49,893 INFO L225 Difference]: With dead ends: 154 [2022-12-14 12:11:49,893 INFO L226 Difference]: Without dead ends: 152 [2022-12-14 12:11:49,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 382 SyntacticMatches, 70 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3086 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2215, Invalid=4591, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 12:11:49,894 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 150 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:49,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 17 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-14 12:11:49,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2022-12-14 12:11:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 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 12:11:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2022-12-14 12:11:49,926 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 142 [2022-12-14 12:11:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:49,927 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2022-12-14 12:11:49,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5609756097560976) internal successors, (146), 40 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2022-12-14 12:11:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 12:11:49,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:49,927 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1] [2022-12-14 12:11:49,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-12-14 12:11:50,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-14 12:11:50,129 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash 422707152, now seen corresponding path program 69 times [2022-12-14 12:11:50,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:50,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516505306] [2022-12-14 12:11:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:50,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:51,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:51,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516505306] [2022-12-14 12:11:51,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516505306] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:51,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437453819] [2022-12-14 12:11:51,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:11:51,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:51,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:51,856 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:51,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-14 12:11:51,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:11:51,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:51,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-14 12:11:51,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:52,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:53,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437453819] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:53,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885510809] [2022-12-14 12:11:53,173 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:53,173 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:53,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:53,174 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:53,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:53,216 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:53,465 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '58655#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:53,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:53,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:53,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 74 [2022-12-14 12:11:53,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531439585] [2022-12-14 12:11:53,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:53,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-14 12:11:53,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:53,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-14 12:11:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1459, Invalid=4861, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 12:11:53,467 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 75 states, 75 states have (on average 1.96) internal successors, (147), 74 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 12:11:54,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:54,561 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2022-12-14 12:11:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-14 12:11:54,562 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.96) internal successors, (147), 74 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) Word has length 145 [2022-12-14 12:11:54,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:54,562 INFO L225 Difference]: With dead ends: 258 [2022-12-14 12:11:54,562 INFO L226 Difference]: Without dead ends: 147 [2022-12-14 12:11:54,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 356 SyntacticMatches, 72 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5157 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2863, Invalid=10477, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 12:11:54,563 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:54,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 371 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:11:54,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-14 12:11:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-12-14 12:11:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-12-14 12:11:54,590 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 145 [2022-12-14 12:11:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:54,591 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-12-14 12:11:54,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.96) internal successors, (147), 74 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 12:11:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-12-14 12:11:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 12:11:54,591 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:54,592 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2022-12-14 12:11:54,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-12-14 12:11:54,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:54,793 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:54,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1769303717, now seen corresponding path program 70 times [2022-12-14 12:11:54,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:54,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751158917] [2022-12-14 12:11:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:54,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:55,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751158917] [2022-12-14 12:11:55,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751158917] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646571272] [2022-12-14 12:11:55,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:11:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:55,831 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:55,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-14 12:11:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 12:11:55,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:56,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:56,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646571272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1126388763] [2022-12-14 12:11:56,905 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:11:56,905 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:56,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:56,905 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:56,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:56,942 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:57,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60338#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:11:57,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:57,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:57,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 41 [2022-12-14 12:11:57,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154129638] [2022-12-14 12:11:57,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:57,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 12:11:57,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 12:11:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=1392, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 12:11:57,109 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 41 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:57,574 INFO L93 Difference]: Finished difference Result 158 states and 159 transitions. [2022-12-14 12:11:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-14 12:11:57,574 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 41 states have internal predecessors, (150), 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 146 [2022-12-14 12:11:57,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:57,575 INFO L225 Difference]: With dead ends: 158 [2022-12-14 12:11:57,575 INFO L226 Difference]: Without dead ends: 156 [2022-12-14 12:11:57,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 393 SyntacticMatches, 72 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3246 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2331, Invalid=4809, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 12:11:57,575 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 154 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:57,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 21 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:11:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-12-14 12:11:57,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2022-12-14 12:11:57,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2022-12-14 12:11:57,604 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 146 [2022-12-14 12:11:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:57,604 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2022-12-14 12:11:57,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 41 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2022-12-14 12:11:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 12:11:57,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:57,605 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1] [2022-12-14 12:11:57,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-12-14 12:11:57,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:57,806 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:11:57,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:57,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1493196916, now seen corresponding path program 71 times [2022-12-14 12:11:57,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:57,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865848274] [2022-12-14 12:11:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:57,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:59,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:59,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865848274] [2022-12-14 12:11:59,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865848274] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:59,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828485999] [2022-12-14 12:11:59,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:11:59,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:59,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:59,410 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:59,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-12-14 12:11:59,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2022-12-14 12:11:59,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:59,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 12:11:59,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:59,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:01,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828485999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:01,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [411092274] [2022-12-14 12:12:01,089 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:01,089 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:01,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:01,089 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:01,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:01,134 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:01,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '61915#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:01,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:01,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:01,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 76 [2022-12-14 12:12:01,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702346832] [2022-12-14 12:12:01,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:01,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-14 12:12:01,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-14 12:12:01,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1536, Invalid=5106, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 12:12:01,428 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 77 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:02,695 INFO L93 Difference]: Finished difference Result 265 states and 267 transitions. [2022-12-14 12:12:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-14 12:12:02,695 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 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 149 [2022-12-14 12:12:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:02,696 INFO L225 Difference]: With dead ends: 265 [2022-12-14 12:12:02,696 INFO L226 Difference]: Without dead ends: 151 [2022-12-14 12:12:02,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 366 SyntacticMatches, 74 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5430 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3016, Invalid=11026, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 12:12:02,697 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:02,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 337 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:12:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-12-14 12:12:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-12-14 12:12:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2022-12-14 12:12:02,732 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 149 [2022-12-14 12:12:02,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:02,732 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2022-12-14 12:12:02,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:02,732 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2022-12-14 12:12:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 12:12:02,732 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:02,733 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2022-12-14 12:12:02,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-12-14 12:12:02,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:02,933 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:02,933 INFO L85 PathProgramCache]: Analyzing trace with hash -376021815, now seen corresponding path program 72 times [2022-12-14 12:12:02,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:02,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476106964] [2022-12-14 12:12:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:02,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:04,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:04,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476106964] [2022-12-14 12:12:04,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476106964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:04,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019063203] [2022-12-14 12:12:04,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:12:04,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:04,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:04,038 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:04,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-14 12:12:04,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:12:04,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:12:04,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-14 12:12:04,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:04,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:05,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019063203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2050144230] [2022-12-14 12:12:05,048 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:05,048 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:05,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:05,052 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:05,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:05,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:05,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '63644#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:05,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:05,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:05,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 42 [2022-12-14 12:12:05,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434646396] [2022-12-14 12:12:05,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:05,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 12:12:05,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:05,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 12:12:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 12:12:05,422 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 43 states, 43 states have (on average 3.5813953488372094) internal successors, (154), 42 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 12:12:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:06,124 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2022-12-14 12:12:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-12-14 12:12:06,125 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.5813953488372094) internal successors, (154), 42 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 150 [2022-12-14 12:12:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:06,126 INFO L225 Difference]: With dead ends: 162 [2022-12-14 12:12:06,126 INFO L226 Difference]: Without dead ends: 160 [2022-12-14 12:12:06,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 404 SyntacticMatches, 74 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3410 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2450, Invalid=5032, Unknown=0, NotChecked=0, Total=7482 [2022-12-14 12:12:06,127 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 158 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:06,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 15 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:12:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-14 12:12:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-12-14 12:12:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-12-14 12:12:06,158 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 150 [2022-12-14 12:12:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:06,158 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-12-14 12:12:06,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.5813953488372094) internal successors, (154), 42 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 12:12:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-12-14 12:12:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 12:12:06,158 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:06,158 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1] [2022-12-14 12:12:06,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-12-14 12:12:06,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:06,359 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:06,360 INFO L85 PathProgramCache]: Analyzing trace with hash -786362416, now seen corresponding path program 73 times [2022-12-14 12:12:06,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:06,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825162966] [2022-12-14 12:12:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:06,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:08,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:08,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825162966] [2022-12-14 12:12:08,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825162966] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:08,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603688979] [2022-12-14 12:12:08,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:12:08,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:08,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:08,033 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:08,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-14 12:12:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:08,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 12:12:08,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:08,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:09,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603688979] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:09,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861333265] [2022-12-14 12:12:09,451 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:09,451 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:09,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:09,452 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:09,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:09,497 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:09,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65263#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:09,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:09,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:09,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 78 [2022-12-14 12:12:09,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420929309] [2022-12-14 12:12:09,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:09,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-14 12:12:09,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:09,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-14 12:12:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1615, Invalid=5357, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 12:12:09,720 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 79 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 78 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:10,750 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2022-12-14 12:12:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-14 12:12:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 78 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-12-14 12:12:10,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:10,750 INFO L225 Difference]: With dead ends: 272 [2022-12-14 12:12:10,750 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 12:12:10,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 376 SyntacticMatches, 76 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5710 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3173, Invalid=11589, Unknown=0, NotChecked=0, Total=14762 [2022-12-14 12:12:10,751 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:10,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 333 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:12:10,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 12:12:10,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-12-14 12:12:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:10,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-12-14 12:12:10,784 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 153 [2022-12-14 12:12:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:10,784 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-12-14 12:12:10,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 78 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-12-14 12:12:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 12:12:10,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:10,785 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2022-12-14 12:12:10,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-12-14 12:12:10,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-12-14 12:12:10,986 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:10,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:10,987 INFO L85 PathProgramCache]: Analyzing trace with hash -217654875, now seen corresponding path program 74 times [2022-12-14 12:12:10,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:10,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648103520] [2022-12-14 12:12:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:10,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 703 proven. 2110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:12,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648103520] [2022-12-14 12:12:12,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648103520] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191715753] [2022-12-14 12:12:12,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:12:12,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:12,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:12,047 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:12,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-12-14 12:12:12,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2022-12-14 12:12:12,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:12:12,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 12:12:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:12,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:13,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191715753] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:13,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753633899] [2022-12-14 12:12:13,072 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:13,072 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:13,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:13,072 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:13,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:13,122 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:13,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67038#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:13,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:13,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:13,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 43 [2022-12-14 12:12:13,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156088889] [2022-12-14 12:12:13,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:13,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 12:12:13,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:13,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 12:12:13,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=1503, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 12:12:13,330 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 44 states, 44 states have (on average 3.590909090909091) internal successors, (158), 43 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:13,997 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2022-12-14 12:12:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-14 12:12:13,997 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.590909090909091) internal successors, (158), 43 states have internal predecessors, (158), 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 154 [2022-12-14 12:12:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:13,998 INFO L225 Difference]: With dead ends: 166 [2022-12-14 12:12:13,998 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 12:12:13,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 415 SyntacticMatches, 76 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3578 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2572, Invalid=5260, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 12:12:13,999 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 162 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:13,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 13 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:12:13,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 12:12:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2022-12-14 12:12:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:14,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2022-12-14 12:12:14,031 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 154 [2022-12-14 12:12:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:14,031 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2022-12-14 12:12:14,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.590909090909091) internal successors, (158), 43 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2022-12-14 12:12:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 12:12:14,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:14,032 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1] [2022-12-14 12:12:14,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-12-14 12:12:14,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:14,233 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:14,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1249056116, now seen corresponding path program 75 times [2022-12-14 12:12:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:14,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575648] [2022-12-14 12:12:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:14,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:16,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:16,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575648] [2022-12-14 12:12:16,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:16,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498388556] [2022-12-14 12:12:16,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:12:16,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:16,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:16,107 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:16,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-12-14 12:12:16,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:12:16,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:12:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-14 12:12:16,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:16,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:17,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498388556] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:17,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570597908] [2022-12-14 12:12:17,751 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:17,751 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:17,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:17,752 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:17,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:17,791 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:18,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68699#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:18,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:18,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:18,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 80 [2022-12-14 12:12:18,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061020432] [2022-12-14 12:12:18,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:18,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-12-14 12:12:18,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-12-14 12:12:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1696, Invalid=5614, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 12:12:18,164 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:19,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:19,199 INFO L93 Difference]: Finished difference Result 279 states and 281 transitions. [2022-12-14 12:12:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-14 12:12:19,200 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 80 states have internal predecessors, (159), 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 157 [2022-12-14 12:12:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:19,201 INFO L225 Difference]: With dead ends: 279 [2022-12-14 12:12:19,201 INFO L226 Difference]: Without dead ends: 159 [2022-12-14 12:12:19,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 386 SyntacticMatches, 78 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5997 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3334, Invalid=12166, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 12:12:19,202 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 4 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:19,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 362 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:12:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-14 12:12:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-12-14 12:12:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-12-14 12:12:19,237 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 157 [2022-12-14 12:12:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:19,237 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-12-14 12:12:19,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.962962962962963) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-12-14 12:12:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 12:12:19,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:19,237 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2022-12-14 12:12:19,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-12-14 12:12:19,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-12-14 12:12:19,438 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash 235269321, now seen corresponding path program 76 times [2022-12-14 12:12:19,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:19,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758384895] [2022-12-14 12:12:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:19,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 741 proven. 2224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:20,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:20,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758384895] [2022-12-14 12:12:20,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758384895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:20,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8537361] [2022-12-14 12:12:20,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:12:20,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:20,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:20,593 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:20,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-12-14 12:12:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:20,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 12:12:20,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:20,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:21,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8537361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:21,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402296762] [2022-12-14 12:12:21,742 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:21,742 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:21,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:21,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:21,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:21,783 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:21,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '70520#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:21,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:21,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:21,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 44 [2022-12-14 12:12:21,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52759377] [2022-12-14 12:12:21,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:21,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 12:12:21,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 12:12:21,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=890, Invalid=1560, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 12:12:21,953 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 45 states, 45 states have (on average 3.6) internal successors, (162), 44 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:22,603 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions. [2022-12-14 12:12:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-14 12:12:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 44 states have internal predecessors, (162), 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 158 [2022-12-14 12:12:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:22,604 INFO L225 Difference]: With dead ends: 170 [2022-12-14 12:12:22,604 INFO L226 Difference]: Without dead ends: 168 [2022-12-14 12:12:22,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 426 SyntacticMatches, 78 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3750 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2697, Invalid=5493, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 12:12:22,605 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 88 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:22,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 24 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:12:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-14 12:12:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2022-12-14 12:12:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2022-12-14 12:12:22,639 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 158 [2022-12-14 12:12:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:22,639 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2022-12-14 12:12:22,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 44 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2022-12-14 12:12:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 12:12:22,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:22,640 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1] [2022-12-14 12:12:22,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-12-14 12:12:22,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:22,841 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:22,841 INFO L85 PathProgramCache]: Analyzing trace with hash -473464880, now seen corresponding path program 77 times [2022-12-14 12:12:22,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:22,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243602156] [2022-12-14 12:12:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:22,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:24,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:24,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243602156] [2022-12-14 12:12:24,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243602156] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:24,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812350218] [2022-12-14 12:12:24,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:12:24,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:24,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:24,514 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:24,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-12-14 12:12:24,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2022-12-14 12:12:24,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:12:24,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 12:12:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:24,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:26,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812350218] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:26,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727745957] [2022-12-14 12:12:26,135 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:26,135 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:26,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:26,136 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:26,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:26,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:26,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72223#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:26,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:26,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:26,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 82 [2022-12-14 12:12:26,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419847370] [2022-12-14 12:12:26,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:26,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-14 12:12:26,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-14 12:12:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1779, Invalid=5877, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 12:12:26,532 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 83 states, 83 states have (on average 1.963855421686747) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:27,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:27,736 INFO L93 Difference]: Finished difference Result 286 states and 288 transitions. [2022-12-14 12:12:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-14 12:12:27,736 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.963855421686747) internal successors, (163), 82 states have internal predecessors, (163), 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 161 [2022-12-14 12:12:27,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:27,737 INFO L225 Difference]: With dead ends: 286 [2022-12-14 12:12:27,737 INFO L226 Difference]: Without dead ends: 163 [2022-12-14 12:12:27,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 396 SyntacticMatches, 80 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6291 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3499, Invalid=12757, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 12:12:27,738 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:27,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 442 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:12:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-12-14 12:12:27,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-12-14 12:12:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2022-12-14 12:12:27,771 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 161 [2022-12-14 12:12:27,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:27,771 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2022-12-14 12:12:27,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.963855421686747) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:27,772 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2022-12-14 12:12:27,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-14 12:12:27,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:27,772 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2022-12-14 12:12:27,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-12-14 12:12:27,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:27,973 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:27,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:27,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1757717669, now seen corresponding path program 78 times [2022-12-14 12:12:27,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:27,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95004725] [2022-12-14 12:12:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:27,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 780 proven. 2341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:29,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95004725] [2022-12-14 12:12:29,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95004725] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12495629] [2022-12-14 12:12:29,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:12:29,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:29,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:29,054 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:29,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-12-14 12:12:29,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:12:29,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:12:29,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 12:12:29,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:29,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:30,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12495629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:30,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30977721] [2022-12-14 12:12:30,334 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:30,334 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:30,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:30,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:30,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:30,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:30,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74090#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:30,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:30,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:30,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 45 [2022-12-14 12:12:30,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386140310] [2022-12-14 12:12:30,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:30,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 12:12:30,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:30,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 12:12:30,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=1618, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 12:12:30,549 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 46 states, 46 states have (on average 3.608695652173913) internal successors, (166), 45 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:31,107 INFO L93 Difference]: Finished difference Result 174 states and 175 transitions. [2022-12-14 12:12:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-12-14 12:12:31,107 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.608695652173913) internal successors, (166), 45 states have internal predecessors, (166), 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 162 [2022-12-14 12:12:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:31,108 INFO L225 Difference]: With dead ends: 174 [2022-12-14 12:12:31,108 INFO L226 Difference]: Without dead ends: 172 [2022-12-14 12:12:31,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 437 SyntacticMatches, 80 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3926 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2825, Invalid=5731, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 12:12:31,109 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 88 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:31,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 16 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:12:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-12-14 12:12:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2022-12-14 12:12:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-12-14 12:12:31,149 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 162 [2022-12-14 12:12:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:31,149 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-12-14 12:12:31,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.608695652173913) internal successors, (166), 45 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-12-14 12:12:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-12-14 12:12:31,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:31,150 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1] [2022-12-14 12:12:31,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-12-14 12:12:31,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:31,351 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash -69375372, now seen corresponding path program 79 times [2022-12-14 12:12:31,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:31,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249846662] [2022-12-14 12:12:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:33,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:33,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249846662] [2022-12-14 12:12:33,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249846662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:33,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115744207] [2022-12-14 12:12:33,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:12:33,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:33,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:33,120 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:33,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-12-14 12:12:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:33,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 12:12:33,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:33,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:34,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115744207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:34,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487884001] [2022-12-14 12:12:34,841 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:34,841 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:34,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:34,841 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:34,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:34,886 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:35,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75835#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:35,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:35,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:35,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 84 [2022-12-14 12:12:35,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258238047] [2022-12-14 12:12:35,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:35,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-12-14 12:12:35,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:35,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-12-14 12:12:35,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1864, Invalid=6146, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 12:12:35,205 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 85 states, 85 states have (on average 1.964705882352941) internal successors, (167), 84 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:36,665 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2022-12-14 12:12:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-14 12:12:36,665 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.964705882352941) internal successors, (167), 84 states have internal predecessors, (167), 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 165 [2022-12-14 12:12:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:36,666 INFO L225 Difference]: With dead ends: 293 [2022-12-14 12:12:36,666 INFO L226 Difference]: Without dead ends: 167 [2022-12-14 12:12:36,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 406 SyntacticMatches, 82 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6592 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3668, Invalid=13362, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 12:12:36,667 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:36,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 401 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:12:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-12-14 12:12:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-12-14 12:12:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2022-12-14 12:12:36,712 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 165 [2022-12-14 12:12:36,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:36,712 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2022-12-14 12:12:36,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.964705882352941) internal successors, (167), 84 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2022-12-14 12:12:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 12:12:36,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:36,712 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2022-12-14 12:12:36,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-12-14 12:12:36,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:36,913 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:36,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1050534711, now seen corresponding path program 80 times [2022-12-14 12:12:36,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:36,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115433555] [2022-12-14 12:12:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:36,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 820 proven. 2461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:38,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:38,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115433555] [2022-12-14 12:12:38,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115433555] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:38,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443322090] [2022-12-14 12:12:38,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:12:38,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:38,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:38,230 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:38,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-12-14 12:12:38,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2022-12-14 12:12:38,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:12:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-14 12:12:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:38,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:39,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443322090] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:39,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2147046604] [2022-12-14 12:12:39,342 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:39,343 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:39,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:39,343 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:39,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:39,387 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:39,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77748#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:39,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:39,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:39,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 46 [2022-12-14 12:12:39,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382791650] [2022-12-14 12:12:39,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:39,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 12:12:39,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 12:12:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=975, Invalid=1677, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 12:12:39,652 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 46 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:40,263 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2022-12-14 12:12:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-14 12:12:40,264 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 46 states have internal predecessors, (170), 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 166 [2022-12-14 12:12:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:40,264 INFO L225 Difference]: With dead ends: 178 [2022-12-14 12:12:40,264 INFO L226 Difference]: Without dead ends: 176 [2022-12-14 12:12:40,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 448 SyntacticMatches, 82 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2956, Invalid=5974, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 12:12:40,265 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 92 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:40,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 22 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:12:40,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-12-14 12:12:40,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 170. [2022-12-14 12:12:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0118343195266273) internal successors, (171), 169 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2022-12-14 12:12:40,305 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 166 [2022-12-14 12:12:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:40,305 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2022-12-14 12:12:40,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 46 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2022-12-14 12:12:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 12:12:40,306 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:40,306 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1] [2022-12-14 12:12:40,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-12-14 12:12:40,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:40,507 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:40,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:40,508 INFO L85 PathProgramCache]: Analyzing trace with hash 951930832, now seen corresponding path program 81 times [2022-12-14 12:12:40,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:40,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005164647] [2022-12-14 12:12:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:40,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:42,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005164647] [2022-12-14 12:12:42,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005164647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464253244] [2022-12-14 12:12:42,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:12:42,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:42,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:42,604 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:42,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-12-14 12:12:42,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:12:42,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:12:42,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 12:12:42,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:42,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:44,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464253244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:44,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1369959289] [2022-12-14 12:12:44,136 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:44,136 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:44,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:44,136 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:44,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:44,174 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:44,441 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '79535#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:44,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:44,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:44,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 86 [2022-12-14 12:12:44,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200839540] [2022-12-14 12:12:44,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:44,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-14 12:12:44,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:44,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-14 12:12:44,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=6421, Unknown=0, NotChecked=0, Total=8372 [2022-12-14 12:12:44,442 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 87 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 86 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:45,508 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2022-12-14 12:12:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-12-14 12:12:45,508 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 86 states have internal predecessors, (171), 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 169 [2022-12-14 12:12:45,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:45,508 INFO L225 Difference]: With dead ends: 300 [2022-12-14 12:12:45,509 INFO L226 Difference]: Without dead ends: 171 [2022-12-14 12:12:45,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 416 SyntacticMatches, 84 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6900 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3841, Invalid=13981, Unknown=0, NotChecked=0, Total=17822 [2022-12-14 12:12:45,509 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 4 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:45,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 466 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:12:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-12-14 12:12:45,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-12-14 12:12:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2022-12-14 12:12:45,549 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 169 [2022-12-14 12:12:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:45,549 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2022-12-14 12:12:45,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 86 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:45,550 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2022-12-14 12:12:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 12:12:45,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:45,550 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2022-12-14 12:12:45,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-12-14 12:12:45,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:45,751 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:45,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1833357221, now seen corresponding path program 82 times [2022-12-14 12:12:45,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:45,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323986032] [2022-12-14 12:12:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:45,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 861 proven. 2584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:47,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:47,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323986032] [2022-12-14 12:12:47,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323986032] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:47,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391607558] [2022-12-14 12:12:47,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:12:47,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:47,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:47,131 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:47,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-12-14 12:12:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:47,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-14 12:12:47,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:47,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:48,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391607558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:48,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628293163] [2022-12-14 12:12:48,309 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:48,309 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:48,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:48,309 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:48,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:48,354 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:48,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '81494#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:48,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:48,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:48,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 47 [2022-12-14 12:12:48,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970141448] [2022-12-14 12:12:48,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:48,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 12:12:48,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:48,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 12:12:48,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=1737, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 12:12:48,524 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 48 states, 48 states have (on average 3.625) internal successors, (174), 47 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:49,154 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2022-12-14 12:12:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-12-14 12:12:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 47 states have internal predecessors, (174), 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 170 [2022-12-14 12:12:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:49,154 INFO L225 Difference]: With dead ends: 182 [2022-12-14 12:12:49,154 INFO L226 Difference]: Without dead ends: 180 [2022-12-14 12:12:49,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 459 SyntacticMatches, 84 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3090, Invalid=6222, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 12:12:49,155 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 92 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:49,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 18 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:12:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-14 12:12:49,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 174. [2022-12-14 12:12:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2022-12-14 12:12:49,193 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 170 [2022-12-14 12:12:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:49,193 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2022-12-14 12:12:49,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 47 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2022-12-14 12:12:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 12:12:49,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:49,194 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1] [2022-12-14 12:12:49,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-12-14 12:12:49,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:49,394 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1549312140, now seen corresponding path program 83 times [2022-12-14 12:12:49,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:49,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674861485] [2022-12-14 12:12:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:51,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:51,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674861485] [2022-12-14 12:12:51,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674861485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:51,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605027820] [2022-12-14 12:12:51,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:12:51,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:51,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:51,285 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:51,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-12-14 12:12:51,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2022-12-14 12:12:51,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:12:51,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-14 12:12:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:51,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:52,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605027820] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:52,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757244507] [2022-12-14 12:12:52,999 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:52,999 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:53,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:53,000 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:53,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:53,044 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:53,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83323#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:53,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:53,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:53,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 88 [2022-12-14 12:12:53,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160359073] [2022-12-14 12:12:53,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:53,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-12-14 12:12:53,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:53,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-12-14 12:12:53,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2040, Invalid=6702, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 12:12:53,413 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 89 states, 89 states have (on average 1.9662921348314606) internal successors, (175), 88 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:54,832 INFO L93 Difference]: Finished difference Result 307 states and 309 transitions. [2022-12-14 12:12:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-14 12:12:54,832 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9662921348314606) internal successors, (175), 88 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-12-14 12:12:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:54,833 INFO L225 Difference]: With dead ends: 307 [2022-12-14 12:12:54,833 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 12:12:54,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 426 SyntacticMatches, 86 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7215 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4018, Invalid=14614, Unknown=0, NotChecked=0, Total=18632 [2022-12-14 12:12:54,834 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 4 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:54,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 440 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:12:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 12:12:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-12-14 12:12:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-12-14 12:12:54,874 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 173 [2022-12-14 12:12:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:54,875 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-12-14 12:12:54,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.9662921348314606) internal successors, (175), 88 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-12-14 12:12:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 12:12:54,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:54,876 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2022-12-14 12:12:54,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-12-14 12:12:55,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:55,077 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:55,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1964174537, now seen corresponding path program 84 times [2022-12-14 12:12:55,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:55,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147797] [2022-12-14 12:12:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:55,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 903 proven. 2710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:56,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:56,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147797] [2022-12-14 12:12:56,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:56,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486923656] [2022-12-14 12:12:56,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:12:56,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:56,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:56,525 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:56,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-12-14 12:12:56,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:12:56,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:12:56,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 12:12:56,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:56,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:57,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486923656] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:57,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1438174398] [2022-12-14 12:12:57,854 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:12:57,854 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:57,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:57,854 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:57,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:57,890 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:58,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '85328#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:12:58,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:58,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:58,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 48 [2022-12-14 12:12:58,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189910514] [2022-12-14 12:12:58,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:58,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 12:12:58,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:58,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 12:12:58,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=1798, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 12:12:58,166 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 49 states, 49 states have (on average 3.63265306122449) internal successors, (178), 48 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:58,766 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2022-12-14 12:12:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-12-14 12:12:58,766 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.63265306122449) internal successors, (178), 48 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-12-14 12:12:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:58,767 INFO L225 Difference]: With dead ends: 186 [2022-12-14 12:12:58,767 INFO L226 Difference]: Without dead ends: 184 [2022-12-14 12:12:58,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 470 SyntacticMatches, 86 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4478 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3227, Invalid=6475, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 12:12:58,768 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 180 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:58,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 15 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:12:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-14 12:12:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 178. [2022-12-14 12:12:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2022-12-14 12:12:58,807 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 174 [2022-12-14 12:12:58,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:58,808 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2022-12-14 12:12:58,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.63265306122449) internal successors, (178), 48 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2022-12-14 12:12:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-14 12:12:58,808 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:58,808 INFO L195 NwaCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1] [2022-12-14 12:12:58,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-12-14 12:12:59,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-12-14 12:12:59,009 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:12:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:59,010 INFO L85 PathProgramCache]: Analyzing trace with hash 94011344, now seen corresponding path program 85 times [2022-12-14 12:12:59,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:59,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208860455] [2022-12-14 12:12:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:59,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:01,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:13:01,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208860455] [2022-12-14 12:13:01,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208860455] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:13:01,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315917854] [2022-12-14 12:13:01,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:13:01,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:01,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:13:01,369 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:13:01,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-12-14 12:13:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:01,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-14 12:13:01,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:13:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:01,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:13:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:03,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315917854] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:13:03,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462534143] [2022-12-14 12:13:03,188 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:13:03,188 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:13:03,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:13:03,188 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:13:03,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:13:03,232 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:13:03,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '87199#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:13:03,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:13:03,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:13:03,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 90 [2022-12-14 12:13:03,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742877786] [2022-12-14 12:13:03,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:13:03,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-14 12:13:03,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:13:03,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-14 12:13:03,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2131, Invalid=6989, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 12:13:03,487 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:13:04,576 INFO L93 Difference]: Finished difference Result 314 states and 316 transitions. [2022-12-14 12:13:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-14 12:13:04,576 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2022-12-14 12:13:04,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:13:04,576 INFO L225 Difference]: With dead ends: 314 [2022-12-14 12:13:04,576 INFO L226 Difference]: Without dead ends: 179 [2022-12-14 12:13:04,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 436 SyntacticMatches, 88 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7537 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4199, Invalid=15261, Unknown=0, NotChecked=0, Total=19460 [2022-12-14 12:13:04,577 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 4 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:13:04,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 320 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:13:04,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-12-14 12:13:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-12-14 12:13:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2022-12-14 12:13:04,617 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 177 [2022-12-14 12:13:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:13:04,618 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2022-12-14 12:13:04,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.967032967032967) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2022-12-14 12:13:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 12:13:04,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:13:04,618 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2022-12-14 12:13:04,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-12-14 12:13:04,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:04,819 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:13:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:13:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -249210203, now seen corresponding path program 86 times [2022-12-14 12:13:04,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:13:04,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551341963] [2022-12-14 12:13:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:13:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:13:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 946 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:06,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:13:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551341963] [2022-12-14 12:13:06,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551341963] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:13:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108028018] [2022-12-14 12:13:06,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:13:06,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:06,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:13:06,217 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:13:06,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-12-14 12:13:06,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2022-12-14 12:13:06,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:13:06,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-14 12:13:06,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:13:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:06,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:13:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:07,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108028018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:13:07,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1008561899] [2022-12-14 12:13:07,592 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:13:07,592 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:13:07,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:13:07,592 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:13:07,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:13:07,636 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:13:07,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '89250#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:13:07,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:13:07,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:13:07,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 49 [2022-12-14 12:13:07,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495140920] [2022-12-14 12:13:07,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:13:07,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 12:13:07,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:13:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 12:13:07,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 12:13:07,777 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 50 states, 50 states have (on average 3.64) internal successors, (182), 49 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:13:08,521 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2022-12-14 12:13:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-14 12:13:08,521 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.64) internal successors, (182), 49 states have internal predecessors, (182), 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 178 [2022-12-14 12:13:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:13:08,521 INFO L225 Difference]: With dead ends: 190 [2022-12-14 12:13:08,521 INFO L226 Difference]: Without dead ends: 188 [2022-12-14 12:13:08,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 481 SyntacticMatches, 88 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4670 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3367, Invalid=6733, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 12:13:08,522 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 98 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:13:08,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 22 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:13:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-12-14 12:13:08,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 182. [2022-12-14 12:13:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2022-12-14 12:13:08,568 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 178 [2022-12-14 12:13:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:13:08,568 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2022-12-14 12:13:08,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.64) internal successors, (182), 49 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2022-12-14 12:13:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-14 12:13:08,568 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:13:08,568 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1] [2022-12-14 12:13:08,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-12-14 12:13:08,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-12-14 12:13:08,769 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:13:08,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:13:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1782117492, now seen corresponding path program 87 times [2022-12-14 12:13:08,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:13:08,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769370778] [2022-12-14 12:13:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:13:08,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:13:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:11,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:13:11,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769370778] [2022-12-14 12:13:11,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769370778] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:13:11,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372365064] [2022-12-14 12:13:11,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:13:11,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:11,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:13:11,212 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:13:11,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-12-14 12:13:11,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:13:11,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:13:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 12:13:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:13:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:11,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:13:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:12,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372365064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:13:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612557470] [2022-12-14 12:13:12,936 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:13:12,936 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:13:12,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:13:12,936 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:13:12,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:13:12,986 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:13:13,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '91163#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:13:13,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:13:13,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:13:13,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 92 [2022-12-14 12:13:13,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432725823] [2022-12-14 12:13:13,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:13:13,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-12-14 12:13:13,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:13:13,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-12-14 12:13:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2224, Invalid=7282, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 12:13:13,446 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 93 states, 93 states have (on average 1.967741935483871) internal successors, (183), 92 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:13:15,037 INFO L93 Difference]: Finished difference Result 321 states and 323 transitions. [2022-12-14 12:13:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-12-14 12:13:15,037 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.967741935483871) internal successors, (183), 92 states have internal predecessors, (183), 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 181 [2022-12-14 12:13:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:13:15,038 INFO L225 Difference]: With dead ends: 321 [2022-12-14 12:13:15,038 INFO L226 Difference]: Without dead ends: 183 [2022-12-14 12:13:15,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 446 SyntacticMatches, 90 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7866 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4384, Invalid=15922, Unknown=0, NotChecked=0, Total=20306 [2022-12-14 12:13:15,039 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:13:15,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 400 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:13:15,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-14 12:13:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-12-14 12:13:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2022-12-14 12:13:15,091 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 181 [2022-12-14 12:13:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:13:15,091 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2022-12-14 12:13:15,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.967741935483871) internal successors, (183), 92 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2022-12-14 12:13:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 12:13:15,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:13:15,092 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2022-12-14 12:13:15,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-12-14 12:13:15,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:15,293 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:13:15,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:13:15,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1937744695, now seen corresponding path program 88 times [2022-12-14 12:13:15,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:13:15,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056314650] [2022-12-14 12:13:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:13:15,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:13:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 990 proven. 2971 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:17,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:13:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056314650] [2022-12-14 12:13:17,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056314650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:13:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37651269] [2022-12-14 12:13:17,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:13:17,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:17,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:13:17,051 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:13:17,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-12-14 12:13:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 12:13:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:13:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:17,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:13:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:18,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37651269] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:13:18,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27653483] [2022-12-14 12:13:18,438 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:13:18,438 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:13:18,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:13:18,438 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:13:18,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:13:18,484 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:13:18,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '93260#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:13:18,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:13:18,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:13:18,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 50 [2022-12-14 12:13:18,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134042616] [2022-12-14 12:13:18,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:13:18,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 12:13:18,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:13:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 12:13:18,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=1923, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 12:13:18,779 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:19,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:13:19,535 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2022-12-14 12:13:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-14 12:13:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 50 states have internal predecessors, (186), 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 182 [2022-12-14 12:13:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:13:19,536 INFO L225 Difference]: With dead ends: 194 [2022-12-14 12:13:19,536 INFO L226 Difference]: Without dead ends: 192 [2022-12-14 12:13:19,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 492 SyntacticMatches, 90 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4866 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3510, Invalid=6996, Unknown=0, NotChecked=0, Total=10506 [2022-12-14 12:13:19,537 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 188 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:13:19,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 15 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:13:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-12-14 12:13:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 186. [2022-12-14 12:13:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2022-12-14 12:13:19,583 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 182 [2022-12-14 12:13:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:13:19,583 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2022-12-14 12:13:19,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2022-12-14 12:13:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-14 12:13:19,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:13:19,584 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 45, 1, 1, 1, 1] [2022-12-14 12:13:19,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-12-14 12:13:19,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-12-14 12:13:19,785 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:13:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:13:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1308037072, now seen corresponding path program 89 times [2022-12-14 12:13:19,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:13:19,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748876362] [2022-12-14 12:13:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:13:19,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:13:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:22,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:13:22,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748876362] [2022-12-14 12:13:22,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748876362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:13:22,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187774818] [2022-12-14 12:13:22,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:13:22,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:22,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:13:22,450 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:13:22,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-12-14 12:13:22,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2022-12-14 12:13:22,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:13:22,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-14 12:13:22,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:13:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:22,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:13:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:24,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187774818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:13:24,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921204359] [2022-12-14 12:13:24,536 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:13:24,536 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:13:24,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:13:24,536 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:13:24,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:13:24,579 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:13:24,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '95215#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:13:24,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:13:24,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:13:24,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 94 [2022-12-14 12:13:24,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2349971] [2022-12-14 12:13:24,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:13:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-12-14 12:13:24,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:13:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-12-14 12:13:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2319, Invalid=7581, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 12:13:24,980 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 95 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:13:26,496 INFO L93 Difference]: Finished difference Result 328 states and 330 transitions. [2022-12-14 12:13:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-12-14 12:13:26,496 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 94 states have internal predecessors, (187), 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 185 [2022-12-14 12:13:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:13:26,497 INFO L225 Difference]: With dead ends: 328 [2022-12-14 12:13:26,498 INFO L226 Difference]: Without dead ends: 187 [2022-12-14 12:13:26,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 456 SyntacticMatches, 92 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8202 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4573, Invalid=16597, Unknown=0, NotChecked=0, Total=21170 [2022-12-14 12:13:26,499 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 4 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:13:26,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 563 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:13:26,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-14 12:13:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-12-14 12:13:26,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-12-14 12:13:26,545 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 185 [2022-12-14 12:13:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:13:26,545 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-12-14 12:13:26,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:26,545 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-12-14 12:13:26,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 12:13:26,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:13:26,545 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2022-12-14 12:13:26,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-12-14 12:13:26,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:26,746 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:13:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:13:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1292352091, now seen corresponding path program 90 times [2022-12-14 12:13:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:13:26,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580225258] [2022-12-14 12:13:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:13:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:13:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1035 proven. 3106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:28,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:13:28,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580225258] [2022-12-14 12:13:28,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580225258] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:13:28,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020992061] [2022-12-14 12:13:28,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:13:28,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:13:28,352 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:13:28,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-12-14 12:13:28,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:13:28,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:13:28,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-14 12:13:28,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:13:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:28,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:13:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:29,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020992061] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:13:29,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782419033] [2022-12-14 12:13:29,798 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:13:29,798 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:13:29,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:13:29,798 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:13:29,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:13:29,858 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:13:30,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '97358#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:13:30,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:13:30,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:13:30,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 51 [2022-12-14 12:13:30,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852690250] [2022-12-14 12:13:30,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:13:30,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 12:13:30,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:13:30,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 12:13:30,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=1987, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 12:13:30,172 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 52 states, 52 states have (on average 3.6538461538461537) internal successors, (190), 51 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:13:30,961 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2022-12-14 12:13:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-14 12:13:30,962 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.6538461538461537) internal successors, (190), 51 states have internal predecessors, (190), 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 186 [2022-12-14 12:13:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:13:30,962 INFO L225 Difference]: With dead ends: 198 [2022-12-14 12:13:30,962 INFO L226 Difference]: Without dead ends: 196 [2022-12-14 12:13:30,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 503 SyntacticMatches, 92 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5066 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3656, Invalid=7264, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 12:13:30,963 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 100 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:13:30,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 16 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:13:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-14 12:13:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 190. [2022-12-14 12:13:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2022-12-14 12:13:31,008 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 186 [2022-12-14 12:13:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:13:31,008 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2022-12-14 12:13:31,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.6538461538461537) internal successors, (190), 51 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2022-12-14 12:13:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-12-14 12:13:31,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:13:31,009 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1] [2022-12-14 12:13:31,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-12-14 12:13:31,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:31,210 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:13:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:13:31,211 INFO L85 PathProgramCache]: Analyzing trace with hash -369481356, now seen corresponding path program 91 times [2022-12-14 12:13:31,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:13:31,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610513637] [2022-12-14 12:13:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:13:31,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:13:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:33,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:13:33,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610513637] [2022-12-14 12:13:33,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610513637] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:13:33,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459609022] [2022-12-14 12:13:33,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:13:33,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:33,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:13:33,834 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:13:33,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-12-14 12:13:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:33,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 12:13:33,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:13:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:34,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:13:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:35,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459609022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:13:35,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911671524] [2022-12-14 12:13:35,724 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:13:35,724 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:13:35,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:13:35,724 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:13:35,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:13:35,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:13:36,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '99355#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:13:36,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:13:36,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:13:36,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 96 [2022-12-14 12:13:36,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426353761] [2022-12-14 12:13:36,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:13:36,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 12:13:36,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:13:36,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 12:13:36,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2416, Invalid=7886, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 12:13:36,187 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 97 states, 97 states have (on average 1.9690721649484537) internal successors, (191), 96 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:13:37,513 INFO L93 Difference]: Finished difference Result 335 states and 337 transitions. [2022-12-14 12:13:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 12:13:37,513 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9690721649484537) internal successors, (191), 96 states have internal predecessors, (191), 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 189 [2022-12-14 12:13:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:13:37,513 INFO L225 Difference]: With dead ends: 335 [2022-12-14 12:13:37,513 INFO L226 Difference]: Without dead ends: 191 [2022-12-14 12:13:37,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 466 SyntacticMatches, 94 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8545 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4766, Invalid=17286, Unknown=0, NotChecked=0, Total=22052 [2022-12-14 12:13:37,515 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 4 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:13:37,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 378 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:13:37,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-12-14 12:13:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-12-14 12:13:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2022-12-14 12:13:37,560 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 189 [2022-12-14 12:13:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:13:37,560 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2022-12-14 12:13:37,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9690721649484537) internal successors, (191), 96 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2022-12-14 12:13:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-12-14 12:13:37,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:13:37,561 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2022-12-14 12:13:37,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-12-14 12:13:37,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:37,762 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:13:37,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:13:37,763 INFO L85 PathProgramCache]: Analyzing trace with hash -585995063, now seen corresponding path program 92 times [2022-12-14 12:13:37,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:13:37,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801068985] [2022-12-14 12:13:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:13:37,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:13:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1081 proven. 3244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:39,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:13:39,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801068985] [2022-12-14 12:13:39,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801068985] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:13:39,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130607035] [2022-12-14 12:13:39,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:13:39,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:39,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:13:39,497 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:13:39,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-12-14 12:13:39,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-12-14 12:13:39,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:13:39,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-14 12:13:39,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:13:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:39,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:13:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:41,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130607035] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:13:41,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1700169195] [2022-12-14 12:13:41,025 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:13:41,025 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:13:41,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:13:41,025 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:13:41,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:13:41,066 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:13:41,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '101544#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:13:41,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:13:41,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:13:41,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 52 [2022-12-14 12:13:41,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638010172] [2022-12-14 12:13:41,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:13:41,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 12:13:41,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:13:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 12:13:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1254, Invalid=2052, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 12:13:41,315 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand has 53 states, 53 states have (on average 3.660377358490566) internal successors, (194), 52 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:13:42,178 INFO L93 Difference]: Finished difference Result 202 states and 203 transitions. [2022-12-14 12:13:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-12-14 12:13:42,178 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.660377358490566) internal successors, (194), 52 states have internal predecessors, (194), 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 190 [2022-12-14 12:13:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:13:42,179 INFO L225 Difference]: With dead ends: 202 [2022-12-14 12:13:42,179 INFO L226 Difference]: Without dead ends: 200 [2022-12-14 12:13:42,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 514 SyntacticMatches, 94 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5270 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3805, Invalid=7537, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 12:13:42,180 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 196 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:13:42,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 21 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:13:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-12-14 12:13:42,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2022-12-14 12:13:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0103626943005182) internal successors, (195), 193 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2022-12-14 12:13:42,229 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 190 [2022-12-14 12:13:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:13:42,229 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2022-12-14 12:13:42,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.660377358490566) internal successors, (194), 52 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2022-12-14 12:13:42,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-12-14 12:13:42,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:13:42,229 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 47, 1, 1, 1, 1] [2022-12-14 12:13:42,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-12-14 12:13:42,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:42,431 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:13:42,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:13:42,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1667956688, now seen corresponding path program 93 times [2022-12-14 12:13:42,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:13:42,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104092155] [2022-12-14 12:13:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:13:42,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:13:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:45,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:13:45,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104092155] [2022-12-14 12:13:45,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104092155] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:13:45,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414421431] [2022-12-14 12:13:45,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:13:45,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:45,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:13:45,341 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:13:45,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-12-14 12:13:45,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:13:45,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:13:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-14 12:13:45,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:13:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:45,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:13:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:47,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414421431] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:13:47,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577064235] [2022-12-14 12:13:47,154 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:13:47,154 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:13:47,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:13:47,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:13:47,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:13:47,197 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:13:47,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '103583#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:13:47,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:13:47,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:13:47,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 98 [2022-12-14 12:13:47,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316825977] [2022-12-14 12:13:47,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:13:47,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-12-14 12:13:47,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:13:47,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-12-14 12:13:47,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2515, Invalid=8197, Unknown=0, NotChecked=0, Total=10712 [2022-12-14 12:13:47,503 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 99 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:13:48,980 INFO L93 Difference]: Finished difference Result 342 states and 344 transitions. [2022-12-14 12:13:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-12-14 12:13:48,980 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 98 states have internal predecessors, (195), 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 193 [2022-12-14 12:13:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:13:48,980 INFO L225 Difference]: With dead ends: 342 [2022-12-14 12:13:48,980 INFO L226 Difference]: Without dead ends: 195 [2022-12-14 12:13:48,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 476 SyntacticMatches, 96 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8895 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4963, Invalid=17989, Unknown=0, NotChecked=0, Total=22952 [2022-12-14 12:13:48,981 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:13:48,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 407 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:13:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-12-14 12:13:49,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-12-14 12:13:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2022-12-14 12:13:49,029 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 193 [2022-12-14 12:13:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:13:49,029 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2022-12-14 12:13:49,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2022-12-14 12:13:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-14 12:13:49,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:13:49,030 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2022-12-14 12:13:49,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-12-14 12:13:49,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:49,231 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:13:49,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:13:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1084780379, now seen corresponding path program 94 times [2022-12-14 12:13:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:13:49,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151045388] [2022-12-14 12:13:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:13:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:13:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1128 proven. 3385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:50,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:13:50,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151045388] [2022-12-14 12:13:50,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151045388] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:13:50,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122039355] [2022-12-14 12:13:50,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:13:50,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:50,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:13:50,829 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:13:50,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-12-14 12:13:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:50,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-14 12:13:50,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:13:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:51,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:13:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:52,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122039355] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:13:52,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1157150095] [2022-12-14 12:13:52,244 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:13:52,244 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:13:52,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:13:52,245 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:13:52,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:13:52,293 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:13:52,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '105818#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:13:52,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:13:52,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:13:52,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 53 [2022-12-14 12:13:52,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789322689] [2022-12-14 12:13:52,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:13:52,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 12:13:52,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:13:52,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 12:13:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2118, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 12:13:52,462 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 54 states, 54 states have (on average 3.6666666666666665) internal successors, (198), 53 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:13:53,213 INFO L93 Difference]: Finished difference Result 206 states and 207 transitions. [2022-12-14 12:13:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-12-14 12:13:53,214 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.6666666666666665) internal successors, (198), 53 states have internal predecessors, (198), 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 194 [2022-12-14 12:13:53,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:13:53,215 INFO L225 Difference]: With dead ends: 206 [2022-12-14 12:13:53,215 INFO L226 Difference]: Without dead ends: 204 [2022-12-14 12:13:53,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 525 SyntacticMatches, 96 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5478 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3957, Invalid=7815, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 12:13:53,216 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 202 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:13:53,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 17 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:13:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-12-14 12:13:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 198. [2022-12-14 12:13:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2022-12-14 12:13:53,309 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 194 [2022-12-14 12:13:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:13:53,309 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2022-12-14 12:13:53,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.6666666666666665) internal successors, (198), 53 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:13:53,309 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2022-12-14 12:13:53,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-12-14 12:13:53,310 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:13:53,310 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 1, 1, 1, 1] [2022-12-14 12:13:53,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-12-14 12:13:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:53,511 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:13:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:13:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1353515404, now seen corresponding path program 95 times [2022-12-14 12:13:53,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:13:53,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976204246] [2022-12-14 12:13:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:13:53,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:13:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:13:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:56,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:13:56,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976204246] [2022-12-14 12:13:56,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976204246] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:13:56,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290663676] [2022-12-14 12:13:56,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:13:56,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:13:56,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:13:56,160 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:13:56,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-12-14 12:13:56,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2022-12-14 12:13:56,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:13:56,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-14 12:13:56,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:13:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:56,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:13:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:13:58,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290663676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:13:58,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1502059588] [2022-12-14 12:13:58,505 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:13:58,505 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:13:58,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:13:58,505 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:13:58,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:13:58,546 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:13:58,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '107899#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:13:58,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:13:58,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:13:58,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 100 [2022-12-14 12:13:58,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93739530] [2022-12-14 12:13:58,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:13:58,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 12:13:58,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:13:58,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 12:13:58,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2616, Invalid=8514, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 12:13:58,959 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:00,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:14:00,794 INFO L93 Difference]: Finished difference Result 349 states and 351 transitions. [2022-12-14 12:14:00,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 12:14:00,794 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 100 states have internal predecessors, (199), 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 197 [2022-12-14 12:14:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:14:00,795 INFO L225 Difference]: With dead ends: 349 [2022-12-14 12:14:00,795 INFO L226 Difference]: Without dead ends: 199 [2022-12-14 12:14:00,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 486 SyntacticMatches, 98 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9252 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5164, Invalid=18706, Unknown=0, NotChecked=0, Total=23870 [2022-12-14 12:14:00,796 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 4 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:14:00,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 589 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:14:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-12-14 12:14:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-12-14 12:14:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 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 12:14:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-12-14 12:14:00,849 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 197 [2022-12-14 12:14:00,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:14:00,849 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-12-14 12:14:00,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-12-14 12:14:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-12-14 12:14:00,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:14:00,850 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2022-12-14 12:14:00,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-12-14 12:14:01,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-12-14 12:14:01,051 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:14:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:14:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash 774970569, now seen corresponding path program 96 times [2022-12-14 12:14:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:14:01,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502568654] [2022-12-14 12:14:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:14:01,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:14:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1176 proven. 3529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:02,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:14:02,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502568654] [2022-12-14 12:14:02,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502568654] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:14:02,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401724553] [2022-12-14 12:14:02,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:14:02,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:02,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:14:02,710 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:14:02,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-12-14 12:14:02,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:14:02,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:14:02,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 104 conjunts are in the unsatisfiable core [2022-12-14 12:14:02,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:14:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:02,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:14:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:04,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401724553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:14:04,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525137992] [2022-12-14 12:14:04,318 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:14:04,318 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:14:04,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:14:04,318 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:14:04,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:14:04,358 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:14:04,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '110180#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:14:04,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:14:04,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:14:04,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 54 [2022-12-14 12:14:04,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258227919] [2022-12-14 12:14:04,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:14:04,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 12:14:04,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:14:04,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 12:14:04,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=2185, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 12:14:04,557 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 54 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:14:05,446 INFO L93 Difference]: Finished difference Result 210 states and 211 transitions. [2022-12-14 12:14:05,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-12-14 12:14:05,447 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 54 states have internal predecessors, (202), 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 198 [2022-12-14 12:14:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:14:05,448 INFO L225 Difference]: With dead ends: 210 [2022-12-14 12:14:05,448 INFO L226 Difference]: Without dead ends: 208 [2022-12-14 12:14:05,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 536 SyntacticMatches, 98 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5690 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4112, Invalid=8098, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 12:14:05,449 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 206 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:14:05,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 17 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:14:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-12-14 12:14:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 202. [2022-12-14 12:14:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0099502487562189) internal successors, (203), 201 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:05,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2022-12-14 12:14:05,523 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 198 [2022-12-14 12:14:05,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:14:05,524 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2022-12-14 12:14:05,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 54 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:05,524 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2022-12-14 12:14:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-12-14 12:14:05,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:14:05,525 INFO L195 NwaCegarLoop]: trace histogram [50, 49, 49, 49, 1, 1, 1, 1] [2022-12-14 12:14:05,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-12-14 12:14:05,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:05,726 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:14:05,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:14:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1703825360, now seen corresponding path program 97 times [2022-12-14 12:14:05,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:14:05,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807373008] [2022-12-14 12:14:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:14:05,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:14:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:08,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:14:08,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807373008] [2022-12-14 12:14:08,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807373008] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:14:08,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143590884] [2022-12-14 12:14:08,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:14:08,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:14:08,708 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:14:08,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-12-14 12:14:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:08,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-14 12:14:08,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:14:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:08,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:14:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:10,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143590884] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:14:10,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [133692170] [2022-12-14 12:14:10,955 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:14:10,955 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:14:10,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:14:10,955 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:14:10,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:14:10,995 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:14:11,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '112303#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:14:11,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:14:11,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:14:11,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 102 [2022-12-14 12:14:11,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773254812] [2022-12-14 12:14:11,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:14:11,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-12-14 12:14:11,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:14:11,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-12-14 12:14:11,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2719, Invalid=8837, Unknown=0, NotChecked=0, Total=11556 [2022-12-14 12:14:11,232 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 103 states, 103 states have (on average 1.970873786407767) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:14:12,495 INFO L93 Difference]: Finished difference Result 356 states and 358 transitions. [2022-12-14 12:14:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-12-14 12:14:12,495 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.970873786407767) internal successors, (203), 102 states have internal predecessors, (203), 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 201 [2022-12-14 12:14:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:14:12,495 INFO L225 Difference]: With dead ends: 356 [2022-12-14 12:14:12,495 INFO L226 Difference]: Without dead ends: 203 [2022-12-14 12:14:12,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 496 SyntacticMatches, 100 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9616 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5369, Invalid=19437, Unknown=0, NotChecked=0, Total=24806 [2022-12-14 12:14:12,497 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 4 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:14:12,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 383 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:14:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-12-14 12:14:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-12-14 12:14:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2022-12-14 12:14:12,552 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 201 [2022-12-14 12:14:12,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:14:12,552 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2022-12-14 12:14:12,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.970873786407767) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:12,552 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2022-12-14 12:14:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-12-14 12:14:12,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:14:12,553 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2022-12-14 12:14:12,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-12-14 12:14:12,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-12-14 12:14:12,753 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:14:12,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:14:12,755 INFO L85 PathProgramCache]: Analyzing trace with hash -254067803, now seen corresponding path program 98 times [2022-12-14 12:14:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:14:12,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755836443] [2022-12-14 12:14:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:14:12,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:14:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1225 proven. 3676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:14,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:14:14,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755836443] [2022-12-14 12:14:14,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755836443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:14:14,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25746301] [2022-12-14 12:14:14,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:14:14,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:14,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:14:14,838 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:14:14,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-12-14 12:14:15,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2022-12-14 12:14:15,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:14:15,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-14 12:14:15,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:14:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:15,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:14:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:16,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25746301] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:14:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [937547649] [2022-12-14 12:14:16,608 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:14:16,608 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:14:16,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:14:16,608 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:14:16,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:14:16,651 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:14:16,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '114630#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:14:16,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:14:16,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:14:16,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 55 [2022-12-14 12:14:16,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435279026] [2022-12-14 12:14:16,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:14:16,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 12:14:16,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:14:16,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 12:14:16,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=2253, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 12:14:16,944 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand has 56 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 55 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:14:18,045 INFO L93 Difference]: Finished difference Result 214 states and 215 transitions. [2022-12-14 12:14:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-12-14 12:14:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 55 states have internal predecessors, (206), 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 202 [2022-12-14 12:14:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:14:18,046 INFO L225 Difference]: With dead ends: 214 [2022-12-14 12:14:18,046 INFO L226 Difference]: Without dead ends: 212 [2022-12-14 12:14:18,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 547 SyntacticMatches, 100 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5906 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4270, Invalid=8386, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 12:14:18,047 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 108 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:14:18,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 22 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:14:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-12-14 12:14:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 206. [2022-12-14 12:14:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.0097560975609756) internal successors, (207), 205 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2022-12-14 12:14:18,105 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 202 [2022-12-14 12:14:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:14:18,105 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2022-12-14 12:14:18,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 55 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2022-12-14 12:14:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-12-14 12:14:18,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:14:18,106 INFO L195 NwaCegarLoop]: trace histogram [51, 50, 50, 50, 1, 1, 1, 1] [2022-12-14 12:14:18,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-12-14 12:14:18,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-12-14 12:14:18,307 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:14:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:14:18,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1196723340, now seen corresponding path program 99 times [2022-12-14 12:14:18,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:14:18,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246352421] [2022-12-14 12:14:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:14:18,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:14:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:21,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:14:21,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246352421] [2022-12-14 12:14:21,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246352421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:14:21,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274839690] [2022-12-14 12:14:21,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:14:21,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:21,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:14:21,260 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:14:21,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-12-14 12:14:21,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:14:21,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:14:21,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 104 conjunts are in the unsatisfiable core [2022-12-14 12:14:21,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:14:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:21,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:14:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:23,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274839690] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:14:23,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598389142] [2022-12-14 12:14:23,660 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:14:23,660 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:14:23,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:14:23,660 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:14:23,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:14:23,700 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:14:23,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '116795#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:14:23,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:14:23,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:14:23,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 104 [2022-12-14 12:14:23,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77672791] [2022-12-14 12:14:23,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:14:23,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-12-14 12:14:23,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:14:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-12-14 12:14:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2824, Invalid=9166, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 12:14:23,978 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand has 105 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 104 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:14:25,571 INFO L93 Difference]: Finished difference Result 363 states and 365 transitions. [2022-12-14 12:14:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-12-14 12:14:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 104 states have internal predecessors, (207), 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 205 [2022-12-14 12:14:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:14:25,571 INFO L225 Difference]: With dead ends: 363 [2022-12-14 12:14:25,571 INFO L226 Difference]: Without dead ends: 207 [2022-12-14 12:14:25,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 506 SyntacticMatches, 102 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9987 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5578, Invalid=20182, Unknown=0, NotChecked=0, Total=25760 [2022-12-14 12:14:25,573 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 4 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:14:25,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 527 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:14:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-14 12:14:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-12-14 12:14:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2022-12-14 12:14:25,631 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 205 [2022-12-14 12:14:25,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:14:25,631 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2022-12-14 12:14:25,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 104 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2022-12-14 12:14:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-12-14 12:14:25,631 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:14:25,632 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2022-12-14 12:14:25,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-12-14 12:14:25,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-12-14 12:14:25,833 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:14:25,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:14:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1186698039, now seen corresponding path program 100 times [2022-12-14 12:14:25,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:14:25,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654394922] [2022-12-14 12:14:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:14:25,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:14:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1275 proven. 3826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:27,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:14:27,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654394922] [2022-12-14 12:14:27,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654394922] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:14:27,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19741380] [2022-12-14 12:14:27,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:14:27,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:27,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:14:27,737 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:14:27,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-12-14 12:14:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:27,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 12:14:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:14:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:28,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:14:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:29,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19741380] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:14:29,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155947673] [2022-12-14 12:14:29,356 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:14:29,356 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:14:29,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:14:29,356 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:14:29,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:14:29,401 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:14:29,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '119168#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:14:29,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:14:29,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:14:29,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 56 [2022-12-14 12:14:29,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820719488] [2022-12-14 12:14:29,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:14:29,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 12:14:29,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:14:29,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 12:14:29,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=2322, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 12:14:29,640 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 57 states, 57 states have (on average 3.6842105263157894) internal successors, (210), 56 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:14:30,872 INFO L93 Difference]: Finished difference Result 218 states and 219 transitions. [2022-12-14 12:14:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-12-14 12:14:30,872 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.6842105263157894) internal successors, (210), 56 states have internal predecessors, (210), 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 206 [2022-12-14 12:14:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:14:30,873 INFO L225 Difference]: With dead ends: 218 [2022-12-14 12:14:30,873 INFO L226 Difference]: Without dead ends: 216 [2022-12-14 12:14:30,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 558 SyntacticMatches, 102 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6126 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4431, Invalid=8679, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 12:14:30,874 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 110 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:14:30,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 22 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:14:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-12-14 12:14:30,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 210. [2022-12-14 12:14:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2022-12-14 12:14:30,930 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 206 [2022-12-14 12:14:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:14:30,930 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2022-12-14 12:14:30,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.6842105263157894) internal successors, (210), 56 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2022-12-14 12:14:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-14 12:14:30,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:14:30,931 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 1, 1, 1, 1] [2022-12-14 12:14:30,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-12-14 12:14:31,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:31,131 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:14:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:14:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1040646192, now seen corresponding path program 101 times [2022-12-14 12:14:31,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:14:31,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090468609] [2022-12-14 12:14:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:14:31,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:14:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:34,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:14:34,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090468609] [2022-12-14 12:14:34,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090468609] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:14:34,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883696096] [2022-12-14 12:14:34,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:14:34,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:34,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:14:34,494 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:14:34,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-12-14 12:14:34,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2022-12-14 12:14:34,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:14:34,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-14 12:14:34,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:14:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:34,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:14:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:37,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883696096] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:14:37,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455762972] [2022-12-14 12:14:37,139 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:14:37,139 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:14:37,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:14:37,140 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:14:37,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:14:37,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:14:37,497 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '121375#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:14:37,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:14:37,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:14:37,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 106 [2022-12-14 12:14:37,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434931774] [2022-12-14 12:14:37,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:14:37,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-12-14 12:14:37,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:14:37,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-12-14 12:14:37,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2931, Invalid=9501, Unknown=0, NotChecked=0, Total=12432 [2022-12-14 12:14:37,499 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 107 states, 107 states have (on average 1.97196261682243) internal successors, (211), 106 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:14:39,294 INFO L93 Difference]: Finished difference Result 370 states and 372 transitions. [2022-12-14 12:14:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-12-14 12:14:39,294 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.97196261682243) internal successors, (211), 106 states have internal predecessors, (211), 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 209 [2022-12-14 12:14:39,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:14:39,294 INFO L225 Difference]: With dead ends: 370 [2022-12-14 12:14:39,295 INFO L226 Difference]: Without dead ends: 211 [2022-12-14 12:14:39,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 516 SyntacticMatches, 104 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10365 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5791, Invalid=20941, Unknown=0, NotChecked=0, Total=26732 [2022-12-14 12:14:39,296 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 4 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:14:39,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 488 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:14:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-14 12:14:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-12-14 12:14:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0095238095238095) internal successors, (212), 210 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2022-12-14 12:14:39,353 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 209 [2022-12-14 12:14:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:14:39,353 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2022-12-14 12:14:39,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.97196261682243) internal successors, (211), 106 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2022-12-14 12:14:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-12-14 12:14:39,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:14:39,354 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2022-12-14 12:14:39,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-12-14 12:14:39,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-12-14 12:14:39,555 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:14:39,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:14:39,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1880835749, now seen corresponding path program 102 times [2022-12-14 12:14:39,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:14:39,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923166723] [2022-12-14 12:14:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:14:39,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:14:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1326 proven. 3979 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:41,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:14:41,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923166723] [2022-12-14 12:14:41,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923166723] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:14:41,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956434528] [2022-12-14 12:14:41,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:14:41,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:41,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:14:41,672 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:14:41,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-12-14 12:14:41,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:14:41,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:14:41,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-14 12:14:41,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:14:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:41,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:14:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:43,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956434528] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:14:43,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1245142188] [2022-12-14 12:14:43,532 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:14:43,532 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:14:43,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:14:43,532 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:14:43,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:14:43,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:14:43,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '123794#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:14:43,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:14:43,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:14:43,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 57 [2022-12-14 12:14:43,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402608055] [2022-12-14 12:14:43,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:14:43,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 12:14:43,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:14:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 12:14:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=2392, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 12:14:43,816 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand has 58 states, 58 states have (on average 3.689655172413793) internal successors, (214), 57 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:14:44,892 INFO L93 Difference]: Finished difference Result 222 states and 223 transitions. [2022-12-14 12:14:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-12-14 12:14:44,892 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.689655172413793) internal successors, (214), 57 states have internal predecessors, (214), 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 210 [2022-12-14 12:14:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:14:44,893 INFO L225 Difference]: With dead ends: 222 [2022-12-14 12:14:44,893 INFO L226 Difference]: Without dead ends: 220 [2022-12-14 12:14:44,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 569 SyntacticMatches, 104 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6350 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4595, Invalid=8977, Unknown=0, NotChecked=0, Total=13572 [2022-12-14 12:14:44,894 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 114 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:14:44,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 18 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:14:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-12-14 12:14:44,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 214. [2022-12-14 12:14:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.0093896713615023) internal successors, (215), 213 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2022-12-14 12:14:44,956 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 210 [2022-12-14 12:14:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:14:44,956 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2022-12-14 12:14:44,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.689655172413793) internal successors, (214), 57 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:44,956 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2022-12-14 12:14:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-12-14 12:14:44,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:14:44,957 INFO L195 NwaCegarLoop]: trace histogram [53, 52, 52, 52, 1, 1, 1, 1] [2022-12-14 12:14:44,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-12-14 12:14:45,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-12-14 12:14:45,158 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:14:45,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:14:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash -160724876, now seen corresponding path program 103 times [2022-12-14 12:14:45,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:14:45,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777010612] [2022-12-14 12:14:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:14:45,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:14:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:48,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:14:48,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777010612] [2022-12-14 12:14:48,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777010612] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:14:48,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284727063] [2022-12-14 12:14:48,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:14:48,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:48,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:14:48,378 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:14:48,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-12-14 12:14:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:48,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 12:14:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:14:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:48,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:14:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:51,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284727063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:14:51,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1850117240] [2022-12-14 12:14:51,069 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:14:51,069 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:14:51,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:14:51,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:14:51,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:14:51,116 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:14:51,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '126043#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:14:51,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:14:51,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:14:51,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 108 [2022-12-14 12:14:51,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366657303] [2022-12-14 12:14:51,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:14:51,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-12-14 12:14:51,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:14:51,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-12-14 12:14:51,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3040, Invalid=9842, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 12:14:51,483 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand has 109 states, 109 states have (on average 1.9724770642201834) internal successors, (215), 108 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:53,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:14:53,434 INFO L93 Difference]: Finished difference Result 377 states and 379 transitions. [2022-12-14 12:14:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-12-14 12:14:53,434 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.9724770642201834) internal successors, (215), 108 states have internal predecessors, (215), 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 213 [2022-12-14 12:14:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:14:53,435 INFO L225 Difference]: With dead ends: 377 [2022-12-14 12:14:53,435 INFO L226 Difference]: Without dead ends: 215 [2022-12-14 12:14:53,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 526 SyntacticMatches, 106 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10750 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6008, Invalid=21714, Unknown=0, NotChecked=0, Total=27722 [2022-12-14 12:14:53,436 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 4 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:14:53,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:14:53,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-12-14 12:14:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-12-14 12:14:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:53,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2022-12-14 12:14:53,494 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 213 [2022-12-14 12:14:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:14:53,494 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2022-12-14 12:14:53,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.9724770642201834) internal successors, (215), 108 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2022-12-14 12:14:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-12-14 12:14:53,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:14:53,495 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1] [2022-12-14 12:14:53,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-12-14 12:14:53,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:53,696 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:14:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:14:53,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1447797559, now seen corresponding path program 104 times [2022-12-14 12:14:53,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:14:53,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127783649] [2022-12-14 12:14:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:14:53,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:14:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:14:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1378 proven. 4135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:55,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:14:55,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127783649] [2022-12-14 12:14:55,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127783649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:14:55,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242399536] [2022-12-14 12:14:55,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:14:55,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:55,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:14:55,784 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:14:55,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-12-14 12:14:56,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2022-12-14 12:14:56,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:14:56,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 112 conjunts are in the unsatisfiable core [2022-12-14 12:14:56,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:14:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1431 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:56,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:14:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1431 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:14:57,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242399536] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:14:57,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1482451178] [2022-12-14 12:14:57,661 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:14:57,661 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:14:57,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:14:57,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:14:57,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:14:57,700 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:14:57,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '128508#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:14:57,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:14:57,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:14:57,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 58 [2022-12-14 12:14:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384422896] [2022-12-14 12:14:57,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:14:57,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 12:14:57,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:14:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 12:14:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1569, Invalid=2463, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 12:14:57,962 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 58 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:14:58,789 INFO L93 Difference]: Finished difference Result 226 states and 227 transitions. [2022-12-14 12:14:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-12-14 12:14:58,789 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 58 states have internal predecessors, (218), 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 214 [2022-12-14 12:14:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:14:58,790 INFO L225 Difference]: With dead ends: 226 [2022-12-14 12:14:58,790 INFO L226 Difference]: Without dead ends: 224 [2022-12-14 12:14:58,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 580 SyntacticMatches, 106 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6578 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4762, Invalid=9280, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 12:14:58,792 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 220 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:14:58,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 17 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:14:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-12-14 12:14:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 218. [2022-12-14 12:14:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.0092165898617511) internal successors, (219), 217 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2022-12-14 12:14:58,859 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 214 [2022-12-14 12:14:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:14:58,860 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2022-12-14 12:14:58,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 58 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:14:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2022-12-14 12:14:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-12-14 12:14:58,860 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:14:58,860 INFO L195 NwaCegarLoop]: trace histogram [54, 53, 53, 53, 1, 1, 1, 1] [2022-12-14 12:14:58,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-12-14 12:14:59,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:14:59,061 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:14:59,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:14:59,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1270673456, now seen corresponding path program 105 times [2022-12-14 12:14:59,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:14:59,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072011357] [2022-12-14 12:14:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:14:59,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:14:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:02,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:02,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072011357] [2022-12-14 12:15:02,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072011357] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:02,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995479942] [2022-12-14 12:15:02,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:15:02,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:02,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:02,610 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:02,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-12-14 12:15:02,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:15:02,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:02,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-14 12:15:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:02,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:05,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995479942] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:05,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1813291542] [2022-12-14 12:15:05,151 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:15:05,151 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:05,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:05,152 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:05,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:05,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:05,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '130799#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:15:05,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:05,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:05,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109, 109] total 110 [2022-12-14 12:15:05,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831932997] [2022-12-14 12:15:05,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:05,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-12-14 12:15:05,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-12-14 12:15:05,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3151, Invalid=10189, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 12:15:05,663 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:07,550 INFO L93 Difference]: Finished difference Result 384 states and 386 transitions. [2022-12-14 12:15:07,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-12-14 12:15:07,551 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 110 states have internal predecessors, (219), 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 217 [2022-12-14 12:15:07,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:07,551 INFO L225 Difference]: With dead ends: 384 [2022-12-14 12:15:07,551 INFO L226 Difference]: Without dead ends: 219 [2022-12-14 12:15:07,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 536 SyntacticMatches, 108 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11142 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6229, Invalid=22501, Unknown=0, NotChecked=0, Total=28730 [2022-12-14 12:15:07,553 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:07,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 543 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:15:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-14 12:15:07,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-12-14 12:15:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2022-12-14 12:15:07,626 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 217 [2022-12-14 12:15:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:07,626 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2022-12-14 12:15:07,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2022-12-14 12:15:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-12-14 12:15:07,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:07,627 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2022-12-14 12:15:07,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-12-14 12:15:07,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-12-14 12:15:07,828 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:07,829 INFO L85 PathProgramCache]: Analyzing trace with hash 867152293, now seen corresponding path program 106 times [2022-12-14 12:15:07,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:07,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918608122] [2022-12-14 12:15:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:07,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1431 proven. 4294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:09,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:09,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918608122] [2022-12-14 12:15:09,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918608122] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:09,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140519615] [2022-12-14 12:15:09,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:15:09,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:09,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:09,868 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:09,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-12-14 12:15:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-14 12:15:09,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1485 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:10,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1485 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:11,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140519615] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:11,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1533139072] [2022-12-14 12:15:11,722 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:15:11,722 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:11,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:11,722 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:11,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:11,763 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:11,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '133310#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:15:11,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:11,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:11,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 59 [2022-12-14 12:15:11,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036932634] [2022-12-14 12:15:11,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:11,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-14 12:15:11,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-14 12:15:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1625, Invalid=2535, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 12:15:11,935 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand has 60 states, 60 states have (on average 3.7) internal successors, (222), 59 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:12,858 INFO L93 Difference]: Finished difference Result 230 states and 231 transitions. [2022-12-14 12:15:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-12-14 12:15:12,858 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.7) internal successors, (222), 59 states have internal predecessors, (222), 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 218 [2022-12-14 12:15:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:12,859 INFO L225 Difference]: With dead ends: 230 [2022-12-14 12:15:12,859 INFO L226 Difference]: Without dead ends: 228 [2022-12-14 12:15:12,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 591 SyntacticMatches, 108 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6810 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4932, Invalid=9588, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 12:15:12,860 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 116 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:12,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 20 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:15:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-12-14 12:15:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 222. [2022-12-14 12:15:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2022-12-14 12:15:12,923 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 218 [2022-12-14 12:15:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:12,923 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2022-12-14 12:15:12,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.7) internal successors, (222), 59 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:12,923 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2022-12-14 12:15:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-12-14 12:15:12,924 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:12,924 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 1, 1, 1, 1] [2022-12-14 12:15:12,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-12-14 12:15:13,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:13,125 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash -889504396, now seen corresponding path program 107 times [2022-12-14 12:15:13,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:13,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24728362] [2022-12-14 12:15:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:13,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:16,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24728362] [2022-12-14 12:15:16,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24728362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147231309] [2022-12-14 12:15:16,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:15:16,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:16,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:16,750 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:16,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-12-14 12:15:16,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 55 check-sat command(s) [2022-12-14 12:15:16,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:16,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 112 conjunts are in the unsatisfiable core [2022-12-14 12:15:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:17,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:19,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147231309] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:19,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [519242806] [2022-12-14 12:15:19,508 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:15:19,508 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:19,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:19,508 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:19,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:19,548 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:19,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '135643#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:15:19,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:19,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:19,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111, 111] total 112 [2022-12-14 12:15:19,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191254297] [2022-12-14 12:15:19,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:19,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-12-14 12:15:19,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:19,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-12-14 12:15:19,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3264, Invalid=10542, Unknown=0, NotChecked=0, Total=13806 [2022-12-14 12:15:19,846 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 113 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 112 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:21,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:21,745 INFO L93 Difference]: Finished difference Result 391 states and 393 transitions. [2022-12-14 12:15:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-12-14 12:15:21,746 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 112 states have internal predecessors, (223), 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 221 [2022-12-14 12:15:21,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:21,746 INFO L225 Difference]: With dead ends: 391 [2022-12-14 12:15:21,746 INFO L226 Difference]: Without dead ends: 223 [2022-12-14 12:15:21,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 546 SyntacticMatches, 110 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11541 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6454, Invalid=23302, Unknown=0, NotChecked=0, Total=29756 [2022-12-14 12:15:21,748 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 4 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:21,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 532 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:15:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-12-14 12:15:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-12-14 12:15:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.009009009009009) internal successors, (224), 222 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2022-12-14 12:15:21,814 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 221 [2022-12-14 12:15:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:21,814 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2022-12-14 12:15:21,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 112 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2022-12-14 12:15:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-12-14 12:15:21,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:21,815 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1] [2022-12-14 12:15:21,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-12-14 12:15:22,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-12-14 12:15:22,016 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:22,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:22,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1662456631, now seen corresponding path program 108 times [2022-12-14 12:15:22,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:22,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495755803] [2022-12-14 12:15:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:22,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1485 proven. 4456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:24,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:24,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495755803] [2022-12-14 12:15:24,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495755803] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:24,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472850941] [2022-12-14 12:15:24,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:15:24,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:24,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:24,211 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:24,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-12-14 12:15:24,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:15:24,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:24,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 116 conjunts are in the unsatisfiable core [2022-12-14 12:15:24,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1540 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:24,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1540 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:26,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472850941] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:26,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [202796206] [2022-12-14 12:15:26,071 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:15:26,071 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:26,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:26,072 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:26,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:26,110 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:26,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '138200#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:15:26,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:26,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:26,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 60 [2022-12-14 12:15:26,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545538736] [2022-12-14 12:15:26,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:26,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-14 12:15:26,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:26,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-14 12:15:26,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=2608, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 12:15:26,307 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 61 states, 61 states have (on average 3.7049180327868854) internal successors, (226), 60 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:27,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:27,355 INFO L93 Difference]: Finished difference Result 234 states and 235 transitions. [2022-12-14 12:15:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-12-14 12:15:27,355 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.7049180327868854) internal successors, (226), 60 states have internal predecessors, (226), 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 222 [2022-12-14 12:15:27,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:27,356 INFO L225 Difference]: With dead ends: 234 [2022-12-14 12:15:27,356 INFO L226 Difference]: Without dead ends: 232 [2022-12-14 12:15:27,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 602 SyntacticMatches, 110 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7046 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5105, Invalid=9901, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 12:15:27,357 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 118 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:27,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 16 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:15:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-12-14 12:15:27,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 226. [2022-12-14 12:15:27,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.008888888888889) internal successors, (227), 225 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2022-12-14 12:15:27,477 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 222 [2022-12-14 12:15:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:27,477 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2022-12-14 12:15:27,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.7049180327868854) internal successors, (226), 60 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2022-12-14 12:15:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-12-14 12:15:27,478 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:27,478 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 55, 1, 1, 1, 1] [2022-12-14 12:15:27,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-12-14 12:15:27,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-12-14 12:15:27,679 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:27,680 INFO L85 PathProgramCache]: Analyzing trace with hash -972783664, now seen corresponding path program 109 times [2022-12-14 12:15:27,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:27,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713875986] [2022-12-14 12:15:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:27,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:31,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:31,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713875986] [2022-12-14 12:15:31,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713875986] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:31,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023150266] [2022-12-14 12:15:31,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:15:31,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:31,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:31,697 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:31,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-12-14 12:15:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:31,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-14 12:15:31,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:32,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:34,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023150266] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:34,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [19649703] [2022-12-14 12:15:34,484 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:15:34,484 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:34,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:34,485 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:34,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:34,527 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:34,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '140575#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:15:34,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:34,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:34,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113, 113] total 114 [2022-12-14 12:15:34,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667213678] [2022-12-14 12:15:34,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:34,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-12-14 12:15:34,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:34,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-12-14 12:15:34,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3379, Invalid=10901, Unknown=0, NotChecked=0, Total=14280 [2022-12-14 12:15:34,910 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 115 states, 115 states have (on average 1.9739130434782608) internal successors, (227), 114 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:37,155 INFO L93 Difference]: Finished difference Result 398 states and 400 transitions. [2022-12-14 12:15:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-12-14 12:15:37,155 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.9739130434782608) internal successors, (227), 114 states have internal predecessors, (227), 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 225 [2022-12-14 12:15:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:37,156 INFO L225 Difference]: With dead ends: 398 [2022-12-14 12:15:37,156 INFO L226 Difference]: Without dead ends: 227 [2022-12-14 12:15:37,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 556 SyntacticMatches, 112 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11947 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=6683, Invalid=24117, Unknown=0, NotChecked=0, Total=30800 [2022-12-14 12:15:37,157 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 4 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:37,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 388 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:15:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-12-14 12:15:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-12-14 12:15:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.008849557522124) internal successors, (228), 226 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:37,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2022-12-14 12:15:37,231 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 225 [2022-12-14 12:15:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:37,231 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2022-12-14 12:15:37,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.9739130434782608) internal successors, (227), 114 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2022-12-14 12:15:37,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-12-14 12:15:37,231 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:37,231 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2022-12-14 12:15:37,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-12-14 12:15:37,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:37,432 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:37,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2144306011, now seen corresponding path program 110 times [2022-12-14 12:15:37,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:37,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570133710] [2022-12-14 12:15:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:37,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1540 proven. 4621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:39,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:39,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570133710] [2022-12-14 12:15:39,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570133710] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:39,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486153692] [2022-12-14 12:15:39,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:15:39,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:39,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:39,829 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:39,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-12-14 12:15:40,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2022-12-14 12:15:40,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:40,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 118 conjunts are in the unsatisfiable core [2022-12-14 12:15:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1596 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:40,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1596 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:42,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486153692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:42,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053652908] [2022-12-14 12:15:42,327 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:15:42,327 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:42,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:42,327 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:42,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:42,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:42,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '143178#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:15:42,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:42,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:42,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 61 [2022-12-14 12:15:42,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526100332] [2022-12-14 12:15:42,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:42,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-14 12:15:42,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:42,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-14 12:15:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=2682, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 12:15:42,772 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand has 62 states, 62 states have (on average 3.7096774193548385) internal successors, (230), 61 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:43,970 INFO L93 Difference]: Finished difference Result 238 states and 239 transitions. [2022-12-14 12:15:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-12-14 12:15:43,970 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.7096774193548385) internal successors, (230), 61 states have internal predecessors, (230), 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 226 [2022-12-14 12:15:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:43,970 INFO L225 Difference]: With dead ends: 238 [2022-12-14 12:15:43,971 INFO L226 Difference]: Without dead ends: 236 [2022-12-14 12:15:43,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 613 SyntacticMatches, 112 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7286 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5281, Invalid=10219, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 12:15:43,971 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 232 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:43,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 17 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:15:43,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-12-14 12:15:44,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2022-12-14 12:15:44,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.0087336244541485) internal successors, (231), 229 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2022-12-14 12:15:44,037 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 226 [2022-12-14 12:15:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:44,037 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2022-12-14 12:15:44,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.7096774193548385) internal successors, (230), 61 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2022-12-14 12:15:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-12-14 12:15:44,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:44,038 INFO L195 NwaCegarLoop]: trace histogram [57, 56, 56, 56, 1, 1, 1, 1] [2022-12-14 12:15:44,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-12-14 12:15:44,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-12-14 12:15:44,239 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1966960012, now seen corresponding path program 111 times [2022-12-14 12:15:44,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:44,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855895233] [2022-12-14 12:15:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:44,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:47,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:47,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855895233] [2022-12-14 12:15:47,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855895233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:47,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846310505] [2022-12-14 12:15:47,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:15:47,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:47,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:47,749 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:47,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-12-14 12:15:47,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:15:47,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:47,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 116 conjunts are in the unsatisfiable core [2022-12-14 12:15:47,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:48,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:50,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846310505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:50,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095878680] [2022-12-14 12:15:50,263 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:15:50,263 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:50,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:50,264 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:50,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:50,304 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:50,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '145595#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:15:50,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:50,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:50,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115, 115] total 116 [2022-12-14 12:15:50,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788949976] [2022-12-14 12:15:50,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:50,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-12-14 12:15:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-12-14 12:15:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3496, Invalid=11266, Unknown=0, NotChecked=0, Total=14762 [2022-12-14 12:15:50,554 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand has 117 states, 117 states have (on average 1.9743589743589745) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:52,415 INFO L93 Difference]: Finished difference Result 405 states and 407 transitions. [2022-12-14 12:15:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-12-14 12:15:52,416 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9743589743589745) internal successors, (231), 116 states have internal predecessors, (231), 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 229 [2022-12-14 12:15:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:52,416 INFO L225 Difference]: With dead ends: 405 [2022-12-14 12:15:52,416 INFO L226 Difference]: Without dead ends: 231 [2022-12-14 12:15:52,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 566 SyntacticMatches, 114 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12360 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6916, Invalid=24946, Unknown=0, NotChecked=0, Total=31862 [2022-12-14 12:15:52,417 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:52,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 558 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:15:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-12-14 12:15:52,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-12-14 12:15:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2022-12-14 12:15:52,483 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 229 [2022-12-14 12:15:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:52,484 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2022-12-14 12:15:52,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9743589743589745) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2022-12-14 12:15:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-12-14 12:15:52,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:52,484 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1] [2022-12-14 12:15:52,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-12-14 12:15:52,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:52,685 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:52,686 INFO L85 PathProgramCache]: Analyzing trace with hash 575282377, now seen corresponding path program 112 times [2022-12-14 12:15:52,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:52,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144961086] [2022-12-14 12:15:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:52,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1596 proven. 4789 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:55,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144961086] [2022-12-14 12:15:55,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144961086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:55,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213519369] [2022-12-14 12:15:55,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:15:55,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:55,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:55,088 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:55,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-12-14 12:15:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:55,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 120 conjunts are in the unsatisfiable core [2022-12-14 12:15:55,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1653 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:55,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1653 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:57,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213519369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:57,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1254992971] [2022-12-14 12:15:57,404 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:15:57,404 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:57,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:57,405 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:57,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:57,448 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:57,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '148244#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:15:57,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:57,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:57,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 62 [2022-12-14 12:15:57,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133712872] [2022-12-14 12:15:57,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:57,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-14 12:15:57,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-14 12:15:57,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1799, Invalid=2757, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 12:15:57,620 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 63 states, 63 states have (on average 3.7142857142857144) internal successors, (234), 62 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:58,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:58,618 INFO L93 Difference]: Finished difference Result 242 states and 243 transitions. [2022-12-14 12:15:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-12-14 12:15:58,618 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.7142857142857144) internal successors, (234), 62 states have internal predecessors, (234), 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 230 [2022-12-14 12:15:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:58,618 INFO L225 Difference]: With dead ends: 242 [2022-12-14 12:15:58,618 INFO L226 Difference]: Without dead ends: 240 [2022-12-14 12:15:58,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 624 SyntacticMatches, 114 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7530 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5460, Invalid=10542, Unknown=0, NotChecked=0, Total=16002 [2022-12-14 12:15:58,620 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 124 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:58,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 20 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:15:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-14 12:15:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2022-12-14 12:15:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0085836909871244) internal successors, (235), 233 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2022-12-14 12:15:58,688 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 230 [2022-12-14 12:15:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:58,688 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2022-12-14 12:15:58,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.7142857142857144) internal successors, (234), 62 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2022-12-14 12:15:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-12-14 12:15:58,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:58,688 INFO L195 NwaCegarLoop]: trace histogram [58, 57, 57, 57, 1, 1, 1, 1] [2022-12-14 12:15:58,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-12-14 12:15:58,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-12-14 12:15:58,890 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:58,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1322602448, now seen corresponding path program 113 times [2022-12-14 12:15:58,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:58,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001511922] [2022-12-14 12:15:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:58,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:02,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:16:02,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001511922] [2022-12-14 12:16:02,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001511922] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:16:02,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627987454] [2022-12-14 12:16:02,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:16:02,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:16:02,946 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:16:02,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-12-14 12:16:03,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2022-12-14 12:16:03,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:16:03,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 118 conjunts are in the unsatisfiable core [2022-12-14 12:16:03,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:16:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:03,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:16:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:05,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627987454] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:16:05,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [480528150] [2022-12-14 12:16:05,841 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:16:05,841 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:16:05,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:16:05,841 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:16:05,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:16:05,882 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:16:06,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '150703#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:16:06,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:16:06,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:16:06,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 118 [2022-12-14 12:16:06,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961039540] [2022-12-14 12:16:06,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:16:06,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-12-14 12:16:06,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:16:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-12-14 12:16:06,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3615, Invalid=11637, Unknown=0, NotChecked=0, Total=15252 [2022-12-14 12:16:06,247 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand has 119 states, 119 states have (on average 1.9747899159663866) internal successors, (235), 118 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:16:08,410 INFO L93 Difference]: Finished difference Result 412 states and 414 transitions. [2022-12-14 12:16:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-12-14 12:16:08,410 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.9747899159663866) internal successors, (235), 118 states have internal predecessors, (235), 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 233 [2022-12-14 12:16:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:16:08,411 INFO L225 Difference]: With dead ends: 412 [2022-12-14 12:16:08,411 INFO L226 Difference]: Without dead ends: 235 [2022-12-14 12:16:08,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 576 SyntacticMatches, 116 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12780 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=7153, Invalid=25789, Unknown=0, NotChecked=0, Total=32942 [2022-12-14 12:16:08,413 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:16:08,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 525 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:16:08,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-12-14 12:16:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-12-14 12:16:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0085470085470085) internal successors, (236), 234 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2022-12-14 12:16:08,484 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 233 [2022-12-14 12:16:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:16:08,484 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2022-12-14 12:16:08,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.9747899159663866) internal successors, (235), 118 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2022-12-14 12:16:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-12-14 12:16:08,485 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:16:08,485 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2022-12-14 12:16:08,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-12-14 12:16:08,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-12-14 12:16:08,686 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:16:08,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:16:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1748346789, now seen corresponding path program 114 times [2022-12-14 12:16:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:16:08,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602454832] [2022-12-14 12:16:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:16:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:16:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1653 proven. 4960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:11,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:16:11,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602454832] [2022-12-14 12:16:11,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602454832] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:16:11,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821285947] [2022-12-14 12:16:11,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:16:11,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:11,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:16:11,212 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:16:11,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-12-14 12:16:11,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:16:11,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:16:11,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 122 conjunts are in the unsatisfiable core [2022-12-14 12:16:11,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:16:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1711 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:11,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:16:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1711 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:13,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821285947] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:16:13,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [311369979] [2022-12-14 12:16:13,278 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:16:13,278 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:16:13,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:16:13,278 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:16:13,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:16:13,324 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:16:13,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '153398#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:16:13,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:16:13,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:16:13,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 63 [2022-12-14 12:16:13,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908148953] [2022-12-14 12:16:13,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:16:13,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 12:16:13,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:16:13,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 12:16:13,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=2833, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 12:16:13,636 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 64 states, 64 states have (on average 3.71875) internal successors, (238), 63 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:14,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:16:14,730 INFO L93 Difference]: Finished difference Result 246 states and 247 transitions. [2022-12-14 12:16:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-12-14 12:16:14,730 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.71875) internal successors, (238), 63 states have internal predecessors, (238), 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 234 [2022-12-14 12:16:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:16:14,731 INFO L225 Difference]: With dead ends: 246 [2022-12-14 12:16:14,731 INFO L226 Difference]: Without dead ends: 244 [2022-12-14 12:16:14,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 635 SyntacticMatches, 116 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7778 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5642, Invalid=10870, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 12:16:14,732 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 124 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:16:14,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 16 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:16:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-14 12:16:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 238. [2022-12-14 12:16:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.0084388185654007) internal successors, (239), 237 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2022-12-14 12:16:14,802 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 234 [2022-12-14 12:16:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:16:14,802 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2022-12-14 12:16:14,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.71875) internal successors, (238), 63 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2022-12-14 12:16:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-12-14 12:16:14,803 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:16:14,803 INFO L195 NwaCegarLoop]: trace histogram [59, 58, 58, 58, 1, 1, 1, 1] [2022-12-14 12:16:14,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-12-14 12:16:15,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:15,004 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:16:15,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:16:15,005 INFO L85 PathProgramCache]: Analyzing trace with hash -64387212, now seen corresponding path program 115 times [2022-12-14 12:16:15,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:16:15,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715209578] [2022-12-14 12:16:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:16:15,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:16:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:19,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:16:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715209578] [2022-12-14 12:16:19,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715209578] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:16:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217505573] [2022-12-14 12:16:19,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:16:19,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:19,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:16:19,133 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:16:19,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-12-14 12:16:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 120 conjunts are in the unsatisfiable core [2022-12-14 12:16:19,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:16:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:19,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:16:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:21,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217505573] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:16:21,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1346922974] [2022-12-14 12:16:21,954 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:16:21,954 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:16:21,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:16:21,954 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:16:21,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:16:22,000 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:16:22,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '155899#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:16:22,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:16:22,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:16:22,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119, 119] total 120 [2022-12-14 12:16:22,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96010331] [2022-12-14 12:16:22,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:16:22,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-12-14 12:16:22,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:16:22,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-12-14 12:16:22,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3736, Invalid=12014, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 12:16:22,391 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:16:24,503 INFO L93 Difference]: Finished difference Result 419 states and 421 transitions. [2022-12-14 12:16:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-12-14 12:16:24,503 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 120 states have internal predecessors, (239), 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 237 [2022-12-14 12:16:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:16:24,504 INFO L225 Difference]: With dead ends: 419 [2022-12-14 12:16:24,504 INFO L226 Difference]: Without dead ends: 239 [2022-12-14 12:16:24,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 586 SyntacticMatches, 118 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13207 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7394, Invalid=26646, Unknown=0, NotChecked=0, Total=34040 [2022-12-14 12:16:24,506 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 4 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:16:24,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 422 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:16:24,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-12-14 12:16:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-12-14 12:16:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 238 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2022-12-14 12:16:24,576 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 237 [2022-12-14 12:16:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:16:24,576 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2022-12-14 12:16:24,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:24,577 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2022-12-14 12:16:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-12-14 12:16:24,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:16:24,577 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1] [2022-12-14 12:16:24,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-12-14 12:16:24,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:24,778 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:16:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:16:24,779 INFO L85 PathProgramCache]: Analyzing trace with hash 994045129, now seen corresponding path program 116 times [2022-12-14 12:16:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:16:24,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792729720] [2022-12-14 12:16:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:16:24,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:16:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1711 proven. 5134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:27,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:16:27,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792729720] [2022-12-14 12:16:27,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792729720] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:16:27,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443048673] [2022-12-14 12:16:27,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:16:27,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:27,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:16:27,436 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:16:27,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-12-14 12:16:27,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2022-12-14 12:16:27,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:16:27,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-14 12:16:27,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:16:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1770 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:27,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:16:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1770 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:29,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443048673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:16:29,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1865410569] [2022-12-14 12:16:29,814 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:16:29,814 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:16:29,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:16:29,815 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:16:29,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:16:29,854 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:16:30,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158640#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:16:30,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:16:30,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:16:30,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 64 [2022-12-14 12:16:30,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000845601] [2022-12-14 12:16:30,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:16:30,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 12:16:30,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:16:30,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 12:16:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1920, Invalid=2910, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 12:16:30,190 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand has 65 states, 65 states have (on average 3.723076923076923) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:31,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:16:31,594 INFO L93 Difference]: Finished difference Result 250 states and 251 transitions. [2022-12-14 12:16:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-12-14 12:16:31,594 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.723076923076923) internal successors, (242), 64 states have internal predecessors, (242), 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 238 [2022-12-14 12:16:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:16:31,595 INFO L225 Difference]: With dead ends: 250 [2022-12-14 12:16:31,595 INFO L226 Difference]: Without dead ends: 248 [2022-12-14 12:16:31,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 893 GetRequests, 646 SyntacticMatches, 118 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8030 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5827, Invalid=11203, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 12:16:31,596 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 246 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:16:31,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 17 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:16:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-12-14 12:16:31,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 242. [2022-12-14 12:16:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.008298755186722) internal successors, (243), 241 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2022-12-14 12:16:31,668 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 238 [2022-12-14 12:16:31,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:16:31,669 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2022-12-14 12:16:31,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.723076923076923) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2022-12-14 12:16:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-12-14 12:16:31,669 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:16:31,669 INFO L195 NwaCegarLoop]: trace histogram [60, 59, 59, 59, 1, 1, 1, 1] [2022-12-14 12:16:31,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-12-14 12:16:31,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-12-14 12:16:31,870 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:16:31,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:16:31,871 INFO L85 PathProgramCache]: Analyzing trace with hash -196247600, now seen corresponding path program 117 times [2022-12-14 12:16:31,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:16:31,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777401980] [2022-12-14 12:16:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:16:31,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:16:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:36,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:16:36,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777401980] [2022-12-14 12:16:36,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777401980] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:16:36,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235704093] [2022-12-14 12:16:36,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:16:36,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:36,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:16:36,074 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:16:36,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-12-14 12:16:36,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:16:36,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:16:36,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 122 conjunts are in the unsatisfiable core [2022-12-14 12:16:36,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:16:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:36,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:16:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:39,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235704093] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:16:39,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935845854] [2022-12-14 12:16:39,297 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:16:39,297 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:16:39,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:16:39,297 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:16:39,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:16:39,337 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:16:39,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '161183#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:16:39,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:16:39,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:16:39,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121, 121] total 122 [2022-12-14 12:16:39,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867337965] [2022-12-14 12:16:39,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:16:39,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-14 12:16:39,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:16:39,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-14 12:16:39,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3859, Invalid=12397, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 12:16:39,837 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand has 123 states, 123 states have (on average 1.975609756097561) internal successors, (243), 122 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:16:42,267 INFO L93 Difference]: Finished difference Result 426 states and 428 transitions. [2022-12-14 12:16:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-12-14 12:16:42,268 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.975609756097561) internal successors, (243), 122 states have internal predecessors, (243), 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 241 [2022-12-14 12:16:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:16:42,268 INFO L225 Difference]: With dead ends: 426 [2022-12-14 12:16:42,268 INFO L226 Difference]: Without dead ends: 243 [2022-12-14 12:16:42,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 596 SyntacticMatches, 120 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13641 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=7639, Invalid=27517, Unknown=0, NotChecked=0, Total=35156 [2022-12-14 12:16:42,270 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 4 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:16:42,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 759 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:16:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-12-14 12:16:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-12-14 12:16:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0082644628099173) internal successors, (244), 242 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2022-12-14 12:16:42,344 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 241 [2022-12-14 12:16:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:16:42,344 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2022-12-14 12:16:42,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.975609756097561) internal successors, (243), 122 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2022-12-14 12:16:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-12-14 12:16:42,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:16:42,344 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2022-12-14 12:16:42,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-12-14 12:16:42,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:42,545 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:16:42,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:16:42,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1280783013, now seen corresponding path program 118 times [2022-12-14 12:16:42,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:16:42,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129126555] [2022-12-14 12:16:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:16:42,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:16:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1770 proven. 5311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:45,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:16:45,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129126555] [2022-12-14 12:16:45,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129126555] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:16:45,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985660114] [2022-12-14 12:16:45,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:16:45,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:45,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:16:45,430 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:16:45,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-12-14 12:16:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:45,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 126 conjunts are in the unsatisfiable core [2022-12-14 12:16:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:16:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1830 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:45,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:16:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1830 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:47,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985660114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:16:47,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1481169308] [2022-12-14 12:16:47,915 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:16:47,915 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:16:47,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:16:47,915 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:16:47,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:16:47,958 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:16:48,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '163970#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:16:48,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:16:48,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:16:48,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 65 [2022-12-14 12:16:48,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687226719] [2022-12-14 12:16:48,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:16:48,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-14 12:16:48,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:16:48,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-14 12:16:48,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1982, Invalid=2988, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 12:16:48,292 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand has 66 states, 66 states have (on average 3.727272727272727) internal successors, (246), 65 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:16:49,582 INFO L93 Difference]: Finished difference Result 254 states and 255 transitions. [2022-12-14 12:16:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-12-14 12:16:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.727272727272727) internal successors, (246), 65 states have internal predecessors, (246), 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 242 [2022-12-14 12:16:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:16:49,583 INFO L225 Difference]: With dead ends: 254 [2022-12-14 12:16:49,583 INFO L226 Difference]: Without dead ends: 252 [2022-12-14 12:16:49,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 657 SyntacticMatches, 120 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8286 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6015, Invalid=11541, Unknown=0, NotChecked=0, Total=17556 [2022-12-14 12:16:49,584 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 130 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:16:49,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 20 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:16:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-12-14 12:16:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2022-12-14 12:16:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.0081632653061225) internal successors, (247), 245 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2022-12-14 12:16:49,659 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 242 [2022-12-14 12:16:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:16:49,659 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2022-12-14 12:16:49,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.727272727272727) internal successors, (246), 65 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2022-12-14 12:16:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-12-14 12:16:49,660 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:16:49,660 INFO L195 NwaCegarLoop]: trace histogram [61, 60, 60, 60, 1, 1, 1, 1] [2022-12-14 12:16:49,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-12-14 12:16:49,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-12-14 12:16:49,861 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:16:49,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:16:49,862 INFO L85 PathProgramCache]: Analyzing trace with hash -677897100, now seen corresponding path program 119 times [2022-12-14 12:16:49,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:16:49,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254690647] [2022-12-14 12:16:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:16:49,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:16:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:54,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:16:54,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254690647] [2022-12-14 12:16:54,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254690647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:16:54,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875227193] [2022-12-14 12:16:54,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:16:54,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:54,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:16:54,319 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:16:54,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-12-14 12:16:54,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2022-12-14 12:16:54,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:16:54,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-14 12:16:54,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:16:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:54,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:16:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:16:57,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875227193] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:16:57,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [790659111] [2022-12-14 12:16:57,692 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:16:57,692 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:16:57,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:16:57,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:16:57,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:16:57,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:16:58,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166555#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:16:58,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:16:58,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:16:58,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123, 123] total 124 [2022-12-14 12:16:58,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925006721] [2022-12-14 12:16:58,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:16:58,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-12-14 12:16:58,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:16:58,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-12-14 12:16:58,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3984, Invalid=12786, Unknown=0, NotChecked=0, Total=16770 [2022-12-14 12:16:58,161 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand has 125 states, 125 states have (on average 1.976) internal successors, (247), 124 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:00,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:17:00,819 INFO L93 Difference]: Finished difference Result 433 states and 435 transitions. [2022-12-14 12:17:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-12-14 12:17:00,820 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.976) internal successors, (247), 124 states have internal predecessors, (247), 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 245 [2022-12-14 12:17:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:17:00,820 INFO L225 Difference]: With dead ends: 433 [2022-12-14 12:17:00,820 INFO L226 Difference]: Without dead ends: 247 [2022-12-14 12:17:00,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 606 SyntacticMatches, 122 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14082 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=7888, Invalid=28402, Unknown=0, NotChecked=0, Total=36290 [2022-12-14 12:17:00,822 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 4 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:17:00,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:17:00,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-12-14 12:17:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-12-14 12:17:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.008130081300813) internal successors, (248), 246 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2022-12-14 12:17:00,901 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 245 [2022-12-14 12:17:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:17:00,902 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2022-12-14 12:17:00,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.976) internal successors, (247), 124 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2022-12-14 12:17:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-12-14 12:17:00,903 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:17:00,903 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1] [2022-12-14 12:17:00,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-12-14 12:17:01,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2022-12-14 12:17:01,104 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:17:01,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:17:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash -617456439, now seen corresponding path program 120 times [2022-12-14 12:17:01,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:17:01,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674676352] [2022-12-14 12:17:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:17:01,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:17:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:17:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1830 proven. 5491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:04,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:17:04,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674676352] [2022-12-14 12:17:04,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674676352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:17:04,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140908458] [2022-12-14 12:17:04,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:17:04,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:17:04,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:17:04,043 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:17:04,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-12-14 12:17:04,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:17:04,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:17:04,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 128 conjunts are in the unsatisfiable core [2022-12-14 12:17:04,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:17:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1891 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:04,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:17:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1891 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:06,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140908458] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:17:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1772236951] [2022-12-14 12:17:06,277 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:17:06,277 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:17:06,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:17:06,278 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:17:06,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:17:06,318 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:17:06,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '169388#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:17:06,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:17:06,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:17:06,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 66 [2022-12-14 12:17:06,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973610626] [2022-12-14 12:17:06,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:17:06,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 12:17:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:17:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 12:17:06,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2045, Invalid=3067, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 12:17:06,530 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand has 67 states, 67 states have (on average 3.7313432835820897) internal successors, (250), 66 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:17:07,621 INFO L93 Difference]: Finished difference Result 258 states and 259 transitions. [2022-12-14 12:17:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-12-14 12:17:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.7313432835820897) internal successors, (250), 66 states have internal predecessors, (250), 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 246 [2022-12-14 12:17:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:17:07,622 INFO L225 Difference]: With dead ends: 258 [2022-12-14 12:17:07,622 INFO L226 Difference]: Without dead ends: 256 [2022-12-14 12:17:07,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 923 GetRequests, 668 SyntacticMatches, 122 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8546 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6206, Invalid=11884, Unknown=0, NotChecked=0, Total=18090 [2022-12-14 12:17:07,624 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 254 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:17:07,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 19 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:17:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-12-14 12:17:07,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2022-12-14 12:17:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.0080321285140563) internal successors, (251), 249 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2022-12-14 12:17:07,706 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 246 [2022-12-14 12:17:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:17:07,706 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2022-12-14 12:17:07,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.7313432835820897) internal successors, (250), 66 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2022-12-14 12:17:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-12-14 12:17:07,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:17:07,707 INFO L195 NwaCegarLoop]: trace histogram [62, 61, 61, 61, 1, 1, 1, 1] [2022-12-14 12:17:07,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-12-14 12:17:07,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:17:07,908 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:17:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:17:07,908 INFO L85 PathProgramCache]: Analyzing trace with hash 704974800, now seen corresponding path program 121 times [2022-12-14 12:17:07,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:17:07,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594069690] [2022-12-14 12:17:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:17:07,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:17:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:17:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:12,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:17:12,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594069690] [2022-12-14 12:17:12,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594069690] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:17:12,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758977705] [2022-12-14 12:17:12,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:17:12,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:17:12,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:17:12,113 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:17:12,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-12-14 12:17:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:17:12,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 126 conjunts are in the unsatisfiable core [2022-12-14 12:17:12,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:17:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:12,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:17:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:15,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758977705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:17:15,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1356659541] [2022-12-14 12:17:15,083 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:17:15,083 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:17:15,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:17:15,083 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:17:15,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:17:15,125 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:17:15,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '172015#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:17:15,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:17:15,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:17:15,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125, 125] total 126 [2022-12-14 12:17:15,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714629963] [2022-12-14 12:17:15,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:17:15,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-12-14 12:17:15,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:17:15,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-12-14 12:17:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4111, Invalid=13181, Unknown=0, NotChecked=0, Total=17292 [2022-12-14 12:17:15,401 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand has 127 states, 127 states have (on average 1.9763779527559056) internal successors, (251), 126 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:17,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:17:17,791 INFO L93 Difference]: Finished difference Result 440 states and 442 transitions. [2022-12-14 12:17:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-12-14 12:17:17,791 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.9763779527559056) internal successors, (251), 126 states have internal predecessors, (251), 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 249 [2022-12-14 12:17:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:17:17,792 INFO L225 Difference]: With dead ends: 440 [2022-12-14 12:17:17,792 INFO L226 Difference]: Without dead ends: 251 [2022-12-14 12:17:17,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 616 SyntacticMatches, 124 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14530 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8141, Invalid=29301, Unknown=0, NotChecked=0, Total=37442 [2022-12-14 12:17:17,794 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 4 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:17:17,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 429 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:17:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-12-14 12:17:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-12-14 12:17:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.008) internal successors, (252), 250 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2022-12-14 12:17:17,877 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 249 [2022-12-14 12:17:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:17:17,877 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2022-12-14 12:17:17,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.9763779527559056) internal successors, (251), 126 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2022-12-14 12:17:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-12-14 12:17:17,878 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:17:17,878 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2022-12-14 12:17:17,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-12-14 12:17:18,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-12-14 12:17:18,079 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:17:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:17:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1529683365, now seen corresponding path program 122 times [2022-12-14 12:17:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:17:18,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481664217] [2022-12-14 12:17:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:17:18,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:17:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:17:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1891 proven. 5674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:20,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:17:20,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481664217] [2022-12-14 12:17:20,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481664217] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:17:20,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046949561] [2022-12-14 12:17:20,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:17:20,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:17:20,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:17:20,775 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:17:20,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-12-14 12:17:21,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2022-12-14 12:17:21,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:17:21,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 130 conjunts are in the unsatisfiable core [2022-12-14 12:17:21,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:17:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1953 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:21,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:17:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1953 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:23,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046949561] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:17:23,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560021530] [2022-12-14 12:17:23,502 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:17:23,502 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:17:23,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:17:23,502 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:17:23,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:17:23,542 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:17:23,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '174894#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:17:23,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:17:23,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:17:23,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 67 [2022-12-14 12:17:23,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14925251] [2022-12-14 12:17:23,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:17:23,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 12:17:23,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:17:23,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 12:17:23,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2109, Invalid=3147, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 12:17:23,892 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand has 68 states, 68 states have (on average 3.735294117647059) internal successors, (254), 67 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:17:25,397 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2022-12-14 12:17:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-12-14 12:17:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.735294117647059) internal successors, (254), 67 states have internal predecessors, (254), 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 250 [2022-12-14 12:17:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:17:25,398 INFO L225 Difference]: With dead ends: 262 [2022-12-14 12:17:25,398 INFO L226 Difference]: Without dead ends: 260 [2022-12-14 12:17:25,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 679 SyntacticMatches, 124 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8810 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6400, Invalid=12232, Unknown=0, NotChecked=0, Total=18632 [2022-12-14 12:17:25,400 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 258 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:17:25,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 17 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:17:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-12-14 12:17:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2022-12-14 12:17:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.007905138339921) internal successors, (255), 253 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:25,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2022-12-14 12:17:25,484 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 250 [2022-12-14 12:17:25,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:17:25,484 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2022-12-14 12:17:25,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.735294117647059) internal successors, (254), 67 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:25,484 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2022-12-14 12:17:25,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-12-14 12:17:25,485 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:17:25,485 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 62, 62, 1, 1, 1, 1] [2022-12-14 12:17:25,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-12-14 12:17:25,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:17:25,686 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:17:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:17:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1198936436, now seen corresponding path program 123 times [2022-12-14 12:17:25,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:17:25,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339337211] [2022-12-14 12:17:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:17:25,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:17:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:17:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:30,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:17:30,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339337211] [2022-12-14 12:17:30,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339337211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:17:30,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257546072] [2022-12-14 12:17:30,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:17:30,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:17:30,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:17:30,979 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:17:30,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-12-14 12:17:31,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:17:31,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:17:31,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 128 conjunts are in the unsatisfiable core [2022-12-14 12:17:31,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:17:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:31,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:17:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:34,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257546072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:17:34,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638350793] [2022-12-14 12:17:34,367 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:17:34,367 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:17:34,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:17:34,367 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:17:34,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:17:34,408 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:17:34,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '177563#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:17:34,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:17:34,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:17:34,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127, 127] total 128 [2022-12-14 12:17:34,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102525944] [2022-12-14 12:17:34,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:17:34,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-12-14 12:17:34,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:17:34,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-12-14 12:17:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4240, Invalid=13582, Unknown=0, NotChecked=0, Total=17822 [2022-12-14 12:17:34,734 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand has 129 states, 129 states have (on average 1.9767441860465116) internal successors, (255), 128 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:17:37,271 INFO L93 Difference]: Finished difference Result 447 states and 449 transitions. [2022-12-14 12:17:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-12-14 12:17:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9767441860465116) internal successors, (255), 128 states have internal predecessors, (255), 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 253 [2022-12-14 12:17:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:17:37,272 INFO L225 Difference]: With dead ends: 447 [2022-12-14 12:17:37,272 INFO L226 Difference]: Without dead ends: 255 [2022-12-14 12:17:37,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 947 GetRequests, 626 SyntacticMatches, 126 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14985 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=8398, Invalid=30214, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 12:17:37,274 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:17:37,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 705 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:17:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-12-14 12:17:37,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-12-14 12:17:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2022-12-14 12:17:37,362 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 253 [2022-12-14 12:17:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:17:37,362 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2022-12-14 12:17:37,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9767441860465116) internal successors, (255), 128 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2022-12-14 12:17:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-12-14 12:17:37,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:17:37,363 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1] [2022-12-14 12:17:37,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-12-14 12:17:37,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-12-14 12:17:37,564 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:17:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:17:37,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1737059529, now seen corresponding path program 124 times [2022-12-14 12:17:37,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:17:37,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199276258] [2022-12-14 12:17:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:17:37,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:17:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:17:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 1953 proven. 5860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:40,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:17:40,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199276258] [2022-12-14 12:17:40,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199276258] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:17:40,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657100694] [2022-12-14 12:17:40,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:17:40,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:17:40,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:17:40,407 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:17:40,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-12-14 12:17:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:17:40,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 132 conjunts are in the unsatisfiable core [2022-12-14 12:17:40,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:17:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 2016 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:40,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:17:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 2016 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:42,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657100694] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:17:42,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [827192531] [2022-12-14 12:17:42,505 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:17:42,505 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:17:42,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:17:42,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:17:42,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:17:42,545 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:17:42,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '180488#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:17:42,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:17:42,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:17:42,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 68 [2022-12-14 12:17:42,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353246462] [2022-12-14 12:17:42,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:17:42,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-14 12:17:42,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:17:42,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-14 12:17:42,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2174, Invalid=3228, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 12:17:42,864 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand has 69 states, 69 states have (on average 3.739130434782609) internal successors, (258), 68 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:17:44,159 INFO L93 Difference]: Finished difference Result 266 states and 267 transitions. [2022-12-14 12:17:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-12-14 12:17:44,159 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.739130434782609) internal successors, (258), 68 states have internal predecessors, (258), 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 254 [2022-12-14 12:17:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:17:44,160 INFO L225 Difference]: With dead ends: 266 [2022-12-14 12:17:44,160 INFO L226 Difference]: Without dead ends: 264 [2022-12-14 12:17:44,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 690 SyntacticMatches, 126 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9078 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6597, Invalid=12585, Unknown=0, NotChecked=0, Total=19182 [2022-12-14 12:17:44,161 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 134 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:17:44,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 16 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:17:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-12-14 12:17:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-12-14 12:17:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.0077821011673151) internal successors, (259), 257 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2022-12-14 12:17:44,250 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 254 [2022-12-14 12:17:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:17:44,250 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2022-12-14 12:17:44,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.739130434782609) internal successors, (258), 68 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2022-12-14 12:17:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-12-14 12:17:44,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:17:44,251 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 63, 1, 1, 1, 1] [2022-12-14 12:17:44,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-12-14 12:17:44,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-12-14 12:17:44,452 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:17:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:17:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1315700784, now seen corresponding path program 125 times [2022-12-14 12:17:44,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:17:44,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576596843] [2022-12-14 12:17:44,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:17:44,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:17:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:17:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:49,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:17:49,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576596843] [2022-12-14 12:17:49,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576596843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:17:49,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101965510] [2022-12-14 12:17:49,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:17:49,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:17:49,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:17:49,373 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:17:49,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-12-14 12:17:49,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2022-12-14 12:17:49,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:17:49,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 130 conjunts are in the unsatisfiable core [2022-12-14 12:17:49,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:17:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:49,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:17:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:52,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101965510] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:17:52,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805583098] [2022-12-14 12:17:52,856 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:17:52,856 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:17:52,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:17:52,856 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:17:52,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:17:52,900 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:17:53,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '183199#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:17:53,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:17:53,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:17:53,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 130 [2022-12-14 12:17:53,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452514299] [2022-12-14 12:17:53,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:17:53,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-12-14 12:17:53,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:17:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-12-14 12:17:53,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=13989, Unknown=0, NotChecked=0, Total=18360 [2022-12-14 12:17:53,233 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:17:55,605 INFO L93 Difference]: Finished difference Result 454 states and 456 transitions. [2022-12-14 12:17:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-12-14 12:17:55,606 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 130 states have internal predecessors, (259), 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 257 [2022-12-14 12:17:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:17:55,606 INFO L225 Difference]: With dead ends: 454 [2022-12-14 12:17:55,606 INFO L226 Difference]: Without dead ends: 259 [2022-12-14 12:17:55,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 636 SyntacticMatches, 128 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15447 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=8659, Invalid=31141, Unknown=0, NotChecked=0, Total=39800 [2022-12-14 12:17:55,608 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:17:55,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 729 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:17:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-12-14 12:17:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-12-14 12:17:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0077519379844961) internal successors, (260), 258 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2022-12-14 12:17:55,696 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 257 [2022-12-14 12:17:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:17:55,696 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2022-12-14 12:17:55,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:17:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2022-12-14 12:17:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-12-14 12:17:55,697 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:17:55,697 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2022-12-14 12:17:55,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-12-14 12:17:55,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:17:55,898 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:17:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:17:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash 290416805, now seen corresponding path program 126 times [2022-12-14 12:17:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:17:55,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513426858] [2022-12-14 12:17:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:17:55,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:17:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:17:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2016 proven. 6049 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:58,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:17:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513426858] [2022-12-14 12:17:58,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513426858] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:17:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2650071] [2022-12-14 12:17:58,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:17:58,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:17:58,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:17:58,862 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:17:58,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-12-14 12:17:59,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:17:59,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:17:59,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 134 conjunts are in the unsatisfiable core [2022-12-14 12:17:59,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:17:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2080 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:17:59,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:18:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2080 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:01,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2650071] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:18:01,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1331424434] [2022-12-14 12:18:01,031 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:18:01,031 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:18:01,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:18:01,031 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:18:01,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:18:01,076 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:18:01,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '186170#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:18:01,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:18:01,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:18:01,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 69 [2022-12-14 12:18:01,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725248993] [2022-12-14 12:18:01,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:18:01,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 12:18:01,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:18:01,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 12:18:01,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2240, Invalid=3310, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 12:18:01,267 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand has 70 states, 70 states have (on average 3.742857142857143) internal successors, (262), 69 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:18:02,568 INFO L93 Difference]: Finished difference Result 270 states and 271 transitions. [2022-12-14 12:18:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-12-14 12:18:02,568 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.742857142857143) internal successors, (262), 69 states have internal predecessors, (262), 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 258 [2022-12-14 12:18:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:18:02,568 INFO L225 Difference]: With dead ends: 270 [2022-12-14 12:18:02,569 INFO L226 Difference]: Without dead ends: 268 [2022-12-14 12:18:02,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 701 SyntacticMatches, 128 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9350 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6797, Invalid=12943, Unknown=0, NotChecked=0, Total=19740 [2022-12-14 12:18:02,570 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 264 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:18:02,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 23 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:18:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-12-14 12:18:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 262. [2022-12-14 12:18:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0076628352490422) internal successors, (263), 261 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2022-12-14 12:18:02,661 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 258 [2022-12-14 12:18:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:18:02,661 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2022-12-14 12:18:02,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.742857142857143) internal successors, (262), 69 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2022-12-14 12:18:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-12-14 12:18:02,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:18:02,662 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 64, 1, 1, 1, 1] [2022-12-14 12:18:02,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-12-14 12:18:02,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:18:02,864 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:18:02,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:18:02,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1747723892, now seen corresponding path program 127 times [2022-12-14 12:18:02,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:18:02,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719242901] [2022-12-14 12:18:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:18:02,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:18:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:18:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:07,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:18:07,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719242901] [2022-12-14 12:18:07,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719242901] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:18:07,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218442833] [2022-12-14 12:18:07,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:18:07,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:18:07,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:18:07,786 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:18:07,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-12-14 12:18:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:18:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 132 conjunts are in the unsatisfiable core [2022-12-14 12:18:07,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:18:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:08,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:18:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:11,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218442833] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:18:11,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340919883] [2022-12-14 12:18:11,333 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:18:11,334 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:18:11,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:18:11,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:18:11,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:18:11,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:18:11,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '188923#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:18:11,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:18:11,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:18:11,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 132 [2022-12-14 12:18:11,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006974518] [2022-12-14 12:18:11,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:18:11,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-12-14 12:18:11,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:18:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-12-14 12:18:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4504, Invalid=14402, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 12:18:11,701 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand has 133 states, 133 states have (on average 1.9774436090225564) internal successors, (263), 132 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:18:14,367 INFO L93 Difference]: Finished difference Result 461 states and 463 transitions. [2022-12-14 12:18:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-12-14 12:18:14,368 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.9774436090225564) internal successors, (263), 132 states have internal predecessors, (263), 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 261 [2022-12-14 12:18:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:18:14,368 INFO L225 Difference]: With dead ends: 461 [2022-12-14 12:18:14,368 INFO L226 Difference]: Without dead ends: 263 [2022-12-14 12:18:14,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 646 SyntacticMatches, 130 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15916 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=8924, Invalid=32082, Unknown=0, NotChecked=0, Total=41006 [2022-12-14 12:18:14,370 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 4 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:18:14,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 721 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:18:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-12-14 12:18:14,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-12-14 12:18:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0076335877862594) internal successors, (264), 262 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2022-12-14 12:18:14,455 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 261 [2022-12-14 12:18:14,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:18:14,456 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2022-12-14 12:18:14,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.9774436090225564) internal successors, (263), 132 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2022-12-14 12:18:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-12-14 12:18:14,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:18:14,456 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1] [2022-12-14 12:18:14,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-12-14 12:18:14,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-12-14 12:18:14,658 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:18:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:18:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash 934091977, now seen corresponding path program 128 times [2022-12-14 12:18:14,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:18:14,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982878639] [2022-12-14 12:18:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:18:14,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:18:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:18:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2080 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:17,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:18:17,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982878639] [2022-12-14 12:18:17,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982878639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:18:17,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130537000] [2022-12-14 12:18:17,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:18:17,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:18:17,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:18:17,902 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:18:17,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-12-14 12:18:18,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2022-12-14 12:18:18,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:18:18,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 136 conjunts are in the unsatisfiable core [2022-12-14 12:18:18,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:18:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2145 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:18,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:18:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2145 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:21,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130537000] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:18:21,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1293314406] [2022-12-14 12:18:21,217 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:18:21,217 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:18:21,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:18:21,217 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:18:21,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:18:21,263 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:18:21,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191940#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:18:21,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:18:21,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:18:21,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 70 [2022-12-14 12:18:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981538844] [2022-12-14 12:18:21,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:18:21,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 12:18:21,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:18:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 12:18:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=3393, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 12:18:21,699 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand has 71 states, 71 states have (on average 3.7464788732394365) internal successors, (266), 70 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:18:23,317 INFO L93 Difference]: Finished difference Result 274 states and 275 transitions. [2022-12-14 12:18:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-12-14 12:18:23,317 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.7464788732394365) internal successors, (266), 70 states have internal predecessors, (266), 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 262 [2022-12-14 12:18:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:18:23,318 INFO L225 Difference]: With dead ends: 274 [2022-12-14 12:18:23,318 INFO L226 Difference]: Without dead ends: 272 [2022-12-14 12:18:23,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 712 SyntacticMatches, 130 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9626 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7000, Invalid=13306, Unknown=0, NotChecked=0, Total=20306 [2022-12-14 12:18:23,319 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 138 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:18:23,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 14 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:18:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-14 12:18:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 266. [2022-12-14 12:18:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.0075471698113208) internal successors, (267), 265 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2022-12-14 12:18:23,412 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 262 [2022-12-14 12:18:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:18:23,412 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2022-12-14 12:18:23,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.7464788732394365) internal successors, (266), 70 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2022-12-14 12:18:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-12-14 12:18:23,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:18:23,413 INFO L195 NwaCegarLoop]: trace histogram [66, 65, 65, 65, 1, 1, 1, 1] [2022-12-14 12:18:23,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-12-14 12:18:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-12-14 12:18:23,614 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:18:23,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:18:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash 445796304, now seen corresponding path program 129 times [2022-12-14 12:18:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:18:23,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826756477] [2022-12-14 12:18:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:18:23,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:18:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:18:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:29,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:18:29,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826756477] [2022-12-14 12:18:29,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826756477] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:18:29,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450478687] [2022-12-14 12:18:29,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:18:29,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:18:29,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:18:29,018 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:18:29,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-12-14 12:18:29,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:18:29,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:18:29,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 134 conjunts are in the unsatisfiable core [2022-12-14 12:18:29,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:18:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:29,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:18:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:32,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450478687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:18:32,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032260945] [2022-12-14 12:18:32,275 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:18:32,275 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:18:32,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:18:32,275 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:18:32,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:18:32,316 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:18:32,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '194735#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:18:32,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:18:32,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:18:32,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 134 [2022-12-14 12:18:32,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546508000] [2022-12-14 12:18:32,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:18:32,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-12-14 12:18:32,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:18:32,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-12-14 12:18:32,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4639, Invalid=14821, Unknown=0, NotChecked=0, Total=19460 [2022-12-14 12:18:32,740 INFO L87 Difference]: Start difference. First operand 266 states and 267 transitions. Second operand has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 134 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:35,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:18:35,007 INFO L93 Difference]: Finished difference Result 468 states and 470 transitions. [2022-12-14 12:18:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-12-14 12:18:35,007 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 134 states have internal predecessors, (267), 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 265 [2022-12-14 12:18:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:18:35,007 INFO L225 Difference]: With dead ends: 468 [2022-12-14 12:18:35,007 INFO L226 Difference]: Without dead ends: 267 [2022-12-14 12:18:35,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 656 SyntacticMatches, 132 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16392 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=9193, Invalid=33037, Unknown=0, NotChecked=0, Total=42230 [2022-12-14 12:18:35,009 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:18:35,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 691 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:18:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-12-14 12:18:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-12-14 12:18:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0075187969924813) internal successors, (268), 266 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2022-12-14 12:18:35,104 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 265 [2022-12-14 12:18:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:18:35,104 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2022-12-14 12:18:35,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 134 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2022-12-14 12:18:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-12-14 12:18:35,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:18:35,105 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1] [2022-12-14 12:18:35,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-12-14 12:18:35,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:18:35,306 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:18:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:18:35,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1185541211, now seen corresponding path program 130 times [2022-12-14 12:18:35,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:18:35,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371634388] [2022-12-14 12:18:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:18:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:18:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:18:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2145 proven. 6436 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:38,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:18:38,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371634388] [2022-12-14 12:18:38,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371634388] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:18:38,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325100429] [2022-12-14 12:18:38,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:18:38,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:18:38,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:18:38,350 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:18:38,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-12-14 12:18:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:18:38,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 138 conjunts are in the unsatisfiable core [2022-12-14 12:18:38,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:18:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2211 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:38,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:18:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2211 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:40,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325100429] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:18:40,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1363711098] [2022-12-14 12:18:40,925 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:18:40,925 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:18:40,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:18:40,925 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:18:40,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:18:40,967 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:18:41,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '197798#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:18:41,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:18:41,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:18:41,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 71 [2022-12-14 12:18:41,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015213247] [2022-12-14 12:18:41,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:18:41,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-14 12:18:41,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:18:41,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-14 12:18:41,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2375, Invalid=3477, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 12:18:41,251 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand has 72 states, 72 states have (on average 3.75) internal successors, (270), 71 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:18:42,339 INFO L93 Difference]: Finished difference Result 278 states and 279 transitions. [2022-12-14 12:18:42,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-12-14 12:18:42,339 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.75) internal successors, (270), 71 states have internal predecessors, (270), 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 266 [2022-12-14 12:18:42,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:18:42,339 INFO L225 Difference]: With dead ends: 278 [2022-12-14 12:18:42,339 INFO L226 Difference]: Without dead ends: 276 [2022-12-14 12:18:42,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 723 SyntacticMatches, 132 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9906 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7206, Invalid=13674, Unknown=0, NotChecked=0, Total=20880 [2022-12-14 12:18:42,341 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 274 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:18:42,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 17 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:18:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-12-14 12:18:42,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2022-12-14 12:18:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.0074349442379182) internal successors, (271), 269 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2022-12-14 12:18:42,431 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 266 [2022-12-14 12:18:42,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:18:42,431 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2022-12-14 12:18:42,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.75) internal successors, (270), 71 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2022-12-14 12:18:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-12-14 12:18:42,432 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:18:42,432 INFO L195 NwaCegarLoop]: trace histogram [67, 66, 66, 66, 1, 1, 1, 1] [2022-12-14 12:18:42,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-12-14 12:18:42,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-12-14 12:18:42,633 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:18:42,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:18:42,634 INFO L85 PathProgramCache]: Analyzing trace with hash -937321612, now seen corresponding path program 131 times [2022-12-14 12:18:42,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:18:42,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131513084] [2022-12-14 12:18:42,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:18:42,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:18:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:18:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6567 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:47,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:18:47,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131513084] [2022-12-14 12:18:47,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131513084] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:18:47,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617659208] [2022-12-14 12:18:47,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:18:47,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:18:47,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:18:47,558 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:18:47,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-12-14 12:18:47,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 67 check-sat command(s) [2022-12-14 12:18:47,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:18:47,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 136 conjunts are in the unsatisfiable core [2022-12-14 12:18:47,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:18:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6567 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:48,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:18:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6567 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:51,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617659208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:18:51,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207225298] [2022-12-14 12:18:51,143 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:18:51,143 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:18:51,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:18:51,143 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:18:51,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:18:51,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:18:51,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '200635#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:18:51,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:18:51,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:18:51,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135, 135] total 136 [2022-12-14 12:18:51,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889594537] [2022-12-14 12:18:51,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:18:51,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-12-14 12:18:51,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:18:51,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-12-14 12:18:51,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4776, Invalid=15246, Unknown=0, NotChecked=0, Total=20022 [2022-12-14 12:18:51,469 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand has 137 states, 137 states have (on average 1.9781021897810218) internal successors, (271), 136 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:18:54,188 INFO L93 Difference]: Finished difference Result 475 states and 477 transitions. [2022-12-14 12:18:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-12-14 12:18:54,188 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.9781021897810218) internal successors, (271), 136 states have internal predecessors, (271), 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 269 [2022-12-14 12:18:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:18:54,188 INFO L225 Difference]: With dead ends: 475 [2022-12-14 12:18:54,188 INFO L226 Difference]: Without dead ends: 271 [2022-12-14 12:18:54,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1007 GetRequests, 666 SyntacticMatches, 134 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16875 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=9466, Invalid=34006, Unknown=0, NotChecked=0, Total=43472 [2022-12-14 12:18:54,190 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 4 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:18:54,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 644 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:18:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-12-14 12:18:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-12-14 12:18:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0074074074074073) internal successors, (272), 270 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2022-12-14 12:18:54,281 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 269 [2022-12-14 12:18:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:18:54,281 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2022-12-14 12:18:54,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.9781021897810218) internal successors, (271), 136 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:54,282 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2022-12-14 12:18:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-12-14 12:18:54,282 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:18:54,282 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1] [2022-12-14 12:18:54,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-12-14 12:18:54,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:18:54,483 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:18:54,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:18:54,484 INFO L85 PathProgramCache]: Analyzing trace with hash 352677065, now seen corresponding path program 132 times [2022-12-14 12:18:54,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:18:54,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694573242] [2022-12-14 12:18:54,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:18:54,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:18:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:18:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2211 proven. 6634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:57,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:18:57,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694573242] [2022-12-14 12:18:57,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694573242] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:18:57,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359825963] [2022-12-14 12:18:57,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:18:57,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:18:57,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:18:57,869 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:18:57,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-12-14 12:18:58,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:18:58,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:18:58,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 140 conjunts are in the unsatisfiable core [2022-12-14 12:18:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:18:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2278 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:18:58,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:19:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2278 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:00,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359825963] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:19:00,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996658557] [2022-12-14 12:19:00,606 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:19:00,606 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:19:00,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:19:00,606 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:19:00,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:19:00,648 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:19:00,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '203744#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:19:00,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:19:00,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:19:00,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 72 [2022-12-14 12:19:00,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264866949] [2022-12-14 12:19:00,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:19:00,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 12:19:00,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:00,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 12:19:00,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2444, Invalid=3562, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 12:19:00,997 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 73 states, 73 states have (on average 3.7534246575342465) internal successors, (274), 72 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:02,674 INFO L93 Difference]: Finished difference Result 282 states and 283 transitions. [2022-12-14 12:19:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-12-14 12:19:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.7534246575342465) internal successors, (274), 72 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2022-12-14 12:19:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:02,675 INFO L225 Difference]: With dead ends: 282 [2022-12-14 12:19:02,675 INFO L226 Difference]: Without dead ends: 280 [2022-12-14 12:19:02,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 734 SyntacticMatches, 134 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10190 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7415, Invalid=14047, Unknown=0, NotChecked=0, Total=21462 [2022-12-14 12:19:02,677 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 276 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:02,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 11 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:19:02,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-12-14 12:19:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 274. [2022-12-14 12:19:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.0073260073260073) internal successors, (275), 273 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2022-12-14 12:19:02,775 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 270 [2022-12-14 12:19:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:02,776 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2022-12-14 12:19:02,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.7534246575342465) internal successors, (274), 72 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2022-12-14 12:19:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-12-14 12:19:02,777 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:02,777 INFO L195 NwaCegarLoop]: trace histogram [68, 67, 67, 67, 1, 1, 1, 1] [2022-12-14 12:19:02,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-12-14 12:19:02,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-12-14 12:19:02,978 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:19:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:02,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1117257680, now seen corresponding path program 133 times [2022-12-14 12:19:02,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:02,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742486051] [2022-12-14 12:19:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:02,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6767 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:09,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:09,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742486051] [2022-12-14 12:19:09,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742486051] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:19:09,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750004234] [2022-12-14 12:19:09,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:19:09,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:09,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:19:09,068 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:19:09,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-12-14 12:19:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:09,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 138 conjunts are in the unsatisfiable core [2022-12-14 12:19:09,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:19:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6767 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:09,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:19:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6767 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:13,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750004234] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:19:13,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317776920] [2022-12-14 12:19:13,352 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:19:13,352 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:19:13,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:19:13,352 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:19:13,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:19:13,392 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:19:13,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '206623#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:19:13,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:19:13,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:19:13,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137, 137] total 138 [2022-12-14 12:19:13,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467163193] [2022-12-14 12:19:13,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:19:13,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-12-14 12:19:13,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:13,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-12-14 12:19:13,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4915, Invalid=15677, Unknown=0, NotChecked=0, Total=20592 [2022-12-14 12:19:13,681 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand has 139 states, 139 states have (on average 1.9784172661870503) internal successors, (275), 138 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:16,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:16,881 INFO L93 Difference]: Finished difference Result 482 states and 484 transitions. [2022-12-14 12:19:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-12-14 12:19:16,881 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.9784172661870503) internal successors, (275), 138 states have internal predecessors, (275), 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 273 [2022-12-14 12:19:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:16,882 INFO L225 Difference]: With dead ends: 482 [2022-12-14 12:19:16,882 INFO L226 Difference]: Without dead ends: 275 [2022-12-14 12:19:16,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 676 SyntacticMatches, 136 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17365 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=9743, Invalid=34989, Unknown=0, NotChecked=0, Total=44732 [2022-12-14 12:19:16,884 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 4 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:16,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 644 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:19:16,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-12-14 12:19:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-12-14 12:19:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0072992700729928) internal successors, (276), 274 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2022-12-14 12:19:16,992 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 273 [2022-12-14 12:19:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:16,992 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2022-12-14 12:19:16,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.9784172661870503) internal successors, (275), 138 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2022-12-14 12:19:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-12-14 12:19:16,993 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:16,993 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1] [2022-12-14 12:19:16,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-12-14 12:19:17,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:17,194 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:19:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:17,195 INFO L85 PathProgramCache]: Analyzing trace with hash -338092379, now seen corresponding path program 134 times [2022-12-14 12:19:17,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:17,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825051509] [2022-12-14 12:19:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:17,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2278 proven. 6835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:20,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825051509] [2022-12-14 12:19:20,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825051509] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:19:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447880577] [2022-12-14 12:19:20,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:19:20,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:20,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:19:20,532 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:19:20,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-12-14 12:19:20,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2022-12-14 12:19:20,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:19:20,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 142 conjunts are in the unsatisfiable core [2022-12-14 12:19:20,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:19:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2346 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:21,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:19:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2346 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:23,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447880577] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:19:23,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371233006] [2022-12-14 12:19:23,609 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:19:23,609 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:19:23,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:19:23,609 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:19:23,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:19:23,655 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:19:23,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '209778#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:19:23,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:19:23,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:19:23,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 73 [2022-12-14 12:19:23,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274382774] [2022-12-14 12:19:23,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:19:23,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-12-14 12:19:23,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:23,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-12-14 12:19:23,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2514, Invalid=3648, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 12:19:23,940 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand has 74 states, 74 states have (on average 3.7567567567567566) internal successors, (278), 73 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:25,214 INFO L93 Difference]: Finished difference Result 286 states and 287 transitions. [2022-12-14 12:19:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-12-14 12:19:25,214 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.7567567567567566) internal successors, (278), 73 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2022-12-14 12:19:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:25,215 INFO L225 Difference]: With dead ends: 286 [2022-12-14 12:19:25,215 INFO L226 Difference]: Without dead ends: 284 [2022-12-14 12:19:25,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 745 SyntacticMatches, 136 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10478 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7627, Invalid=14425, Unknown=0, NotChecked=0, Total=22052 [2022-12-14 12:19:25,217 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 146 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:25,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 20 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:19:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-12-14 12:19:25,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 278. [2022-12-14 12:19:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.0072202166064983) internal successors, (279), 277 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 279 transitions. [2022-12-14 12:19:25,313 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 279 transitions. Word has length 274 [2022-12-14 12:19:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:25,313 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 279 transitions. [2022-12-14 12:19:25,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.7567567567567566) internal successors, (278), 73 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 279 transitions. [2022-12-14 12:19:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-12-14 12:19:25,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:25,314 INFO L195 NwaCegarLoop]: trace histogram [69, 68, 68, 68, 1, 1, 1, 1] [2022-12-14 12:19:25,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-12-14 12:19:25,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-12-14 12:19:25,515 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:19:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash -406933388, now seen corresponding path program 135 times [2022-12-14 12:19:25,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:25,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519965395] [2022-12-14 12:19:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6970 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:30,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:30,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519965395] [2022-12-14 12:19:30,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519965395] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:19:30,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502047757] [2022-12-14 12:19:30,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:19:30,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:30,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:19:30,489 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:19:30,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-12-14 12:19:30,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:19:30,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:19:30,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 140 conjunts are in the unsatisfiable core [2022-12-14 12:19:30,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:19:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6970 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:30,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:19:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6970 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:34,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502047757] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:19:34,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005934888] [2022-12-14 12:19:34,267 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:19:34,267 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:19:34,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:19:34,268 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:19:34,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:19:34,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:19:34,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '212699#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:19:34,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:19:34,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:19:34,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 140 [2022-12-14 12:19:34,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403867987] [2022-12-14 12:19:34,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:19:34,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-12-14 12:19:34,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:34,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-12-14 12:19:34,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5056, Invalid=16114, Unknown=0, NotChecked=0, Total=21170 [2022-12-14 12:19:34,605 INFO L87 Difference]: Start difference. First operand 278 states and 279 transitions. Second operand has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 140 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:37,371 INFO L93 Difference]: Finished difference Result 489 states and 491 transitions. [2022-12-14 12:19:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-12-14 12:19:37,372 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 140 states have internal predecessors, (279), 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 277 [2022-12-14 12:19:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:37,372 INFO L225 Difference]: With dead ends: 489 [2022-12-14 12:19:37,372 INFO L226 Difference]: Without dead ends: 279 [2022-12-14 12:19:37,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1037 GetRequests, 686 SyntacticMatches, 138 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17862 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=10024, Invalid=35986, Unknown=0, NotChecked=0, Total=46010 [2022-12-14 12:19:37,374 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 4 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:37,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 591 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:19:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-12-14 12:19:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2022-12-14 12:19:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2022-12-14 12:19:37,470 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 277 [2022-12-14 12:19:37,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:37,471 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2022-12-14 12:19:37,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9787234042553192) internal successors, (279), 140 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2022-12-14 12:19:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-12-14 12:19:37,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:37,472 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1] [2022-12-14 12:19:37,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-12-14 12:19:37,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-12-14 12:19:37,673 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:19:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:37,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1157997367, now seen corresponding path program 136 times [2022-12-14 12:19:37,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:37,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860059393] [2022-12-14 12:19:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:37,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2346 proven. 7039 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:41,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:41,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860059393] [2022-12-14 12:19:41,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860059393] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:19:41,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889397495] [2022-12-14 12:19:41,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:19:41,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:41,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:19:41,069 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:19:41,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-12-14 12:19:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:41,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 144 conjunts are in the unsatisfiable core [2022-12-14 12:19:41,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:19:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2415 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:41,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:19:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2415 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:43,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889397495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:19:43,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [198885572] [2022-12-14 12:19:43,539 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:19:43,539 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:19:43,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:19:43,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:19:43,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:19:43,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:19:43,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '215900#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:19:43,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:19:43,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:19:43,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 74 [2022-12-14 12:19:43,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15325563] [2022-12-14 12:19:43,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:19:43,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-14 12:19:43,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:43,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-14 12:19:43,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2585, Invalid=3735, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 12:19:43,805 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand has 75 states, 75 states have (on average 3.76) internal successors, (282), 74 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:45,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:45,259 INFO L93 Difference]: Finished difference Result 290 states and 291 transitions. [2022-12-14 12:19:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-12-14 12:19:45,259 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.76) internal successors, (282), 74 states have internal predecessors, (282), 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 278 [2022-12-14 12:19:45,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:45,260 INFO L225 Difference]: With dead ends: 290 [2022-12-14 12:19:45,260 INFO L226 Difference]: Without dead ends: 288 [2022-12-14 12:19:45,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 756 SyntacticMatches, 138 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10770 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7842, Invalid=14808, Unknown=0, NotChecked=0, Total=22650 [2022-12-14 12:19:45,261 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 286 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:45,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 27 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:19:45,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-12-14 12:19:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 282. [2022-12-14 12:19:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.00711743772242) internal successors, (283), 281 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2022-12-14 12:19:45,367 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 278 [2022-12-14 12:19:45,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:45,367 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2022-12-14 12:19:45,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.76) internal successors, (282), 74 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2022-12-14 12:19:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-12-14 12:19:45,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:45,368 INFO L195 NwaCegarLoop]: trace histogram [70, 69, 69, 69, 1, 1, 1, 1] [2022-12-14 12:19:45,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-12-14 12:19:45,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:45,569 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:19:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash -717418544, now seen corresponding path program 137 times [2022-12-14 12:19:45,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:45,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732342687] [2022-12-14 12:19:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:45,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 7176 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:51,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:51,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732342687] [2022-12-14 12:19:51,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732342687] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:19:51,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554600537] [2022-12-14 12:19:51,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:19:51,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:51,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:19:51,473 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:19:51,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-12-14 12:19:51,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2022-12-14 12:19:51,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:19:51,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 142 conjunts are in the unsatisfiable core [2022-12-14 12:19:51,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:19:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 7176 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:52,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:19:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 7176 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:56,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554600537] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:19:56,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [939907778] [2022-12-14 12:19:56,303 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:19:56,303 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:19:56,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:19:56,303 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:19:56,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:19:56,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:19:56,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '218863#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:19:56,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:19:56,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:19:56,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141, 141] total 142 [2022-12-14 12:19:56,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421275259] [2022-12-14 12:19:56,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:19:56,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-12-14 12:19:56,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:56,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-12-14 12:19:56,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5199, Invalid=16557, Unknown=0, NotChecked=0, Total=21756 [2022-12-14 12:19:56,653 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand has 143 states, 143 states have (on average 1.979020979020979) internal successors, (283), 142 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:59,741 INFO L93 Difference]: Finished difference Result 496 states and 498 transitions. [2022-12-14 12:19:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-12-14 12:19:59,741 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.979020979020979) internal successors, (283), 142 states have internal predecessors, (283), 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 281 [2022-12-14 12:19:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:59,742 INFO L225 Difference]: With dead ends: 496 [2022-12-14 12:19:59,742 INFO L226 Difference]: Without dead ends: 283 [2022-12-14 12:19:59,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 696 SyntacticMatches, 140 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18366 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=10309, Invalid=36997, Unknown=0, NotChecked=0, Total=47306 [2022-12-14 12:19:59,744 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 4 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:59,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 561 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:19:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-12-14 12:19:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-12-14 12:19:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.0070921985815602) internal successors, (284), 282 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2022-12-14 12:19:59,849 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 281 [2022-12-14 12:19:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:59,850 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2022-12-14 12:19:59,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.979020979020979) internal successors, (283), 142 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:19:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2022-12-14 12:19:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-12-14 12:19:59,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:59,851 INFO L195 NwaCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1] [2022-12-14 12:19:59,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-12-14 12:20:00,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:00,052 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:20:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:20:00,052 INFO L85 PathProgramCache]: Analyzing trace with hash 259033509, now seen corresponding path program 138 times [2022-12-14 12:20:00,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:20:00,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852606799] [2022-12-14 12:20:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:20:00,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:20:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:20:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2415 proven. 7246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:03,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:20:03,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852606799] [2022-12-14 12:20:03,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852606799] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:20:03,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084959779] [2022-12-14 12:20:03,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:20:03,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:03,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:20:03,627 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:20:03,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-12-14 12:20:03,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:20:03,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:20:03,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 146 conjunts are in the unsatisfiable core [2022-12-14 12:20:03,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:20:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2485 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:04,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:20:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2485 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:06,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084959779] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:20:06,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455330067] [2022-12-14 12:20:06,639 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:20:06,640 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:20:06,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:20:06,640 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:20:06,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:20:06,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:20:07,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '222110#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:20:07,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:20:07,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:20:07,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 75 [2022-12-14 12:20:07,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658162347] [2022-12-14 12:20:07,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:20:07,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-14 12:20:07,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:20:07,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-14 12:20:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2657, Invalid=3823, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 12:20:07,029 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand has 76 states, 76 states have (on average 3.763157894736842) internal successors, (286), 75 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:20:08,279 INFO L93 Difference]: Finished difference Result 294 states and 295 transitions. [2022-12-14 12:20:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-12-14 12:20:08,280 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.763157894736842) internal successors, (286), 75 states have internal predecessors, (286), 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 282 [2022-12-14 12:20:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:20:08,280 INFO L225 Difference]: With dead ends: 294 [2022-12-14 12:20:08,280 INFO L226 Difference]: Without dead ends: 292 [2022-12-14 12:20:08,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 767 SyntacticMatches, 140 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11066 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8060, Invalid=15196, Unknown=0, NotChecked=0, Total=23256 [2022-12-14 12:20:08,282 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 150 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:20:08,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 14 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:20:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-12-14 12:20:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 286. [2022-12-14 12:20:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.0070175438596491) internal successors, (287), 285 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2022-12-14 12:20:08,383 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 282 [2022-12-14 12:20:08,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:20:08,384 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2022-12-14 12:20:08,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.763157894736842) internal successors, (286), 75 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2022-12-14 12:20:08,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-12-14 12:20:08,384 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:20:08,384 INFO L195 NwaCegarLoop]: trace histogram [71, 70, 70, 70, 1, 1, 1, 1] [2022-12-14 12:20:08,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-12-14 12:20:08,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-12-14 12:20:08,586 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:20:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:20:08,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1184144012, now seen corresponding path program 139 times [2022-12-14 12:20:08,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:20:08,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619570405] [2022-12-14 12:20:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:20:08,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:20:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:20:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7385 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:14,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:20:14,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619570405] [2022-12-14 12:20:14,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619570405] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:20:14,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464956552] [2022-12-14 12:20:14,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:20:14,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:14,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:20:14,507 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:20:14,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-12-14 12:20:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:20:14,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 144 conjunts are in the unsatisfiable core [2022-12-14 12:20:14,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:20:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7385 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:14,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:20:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7385 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:18,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464956552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:20:18,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2031946361] [2022-12-14 12:20:18,213 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:20:18,213 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:20:18,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:20:18,213 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:20:18,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:20:18,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:20:18,727 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '225115#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:20:18,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:20:18,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:20:18,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143, 143] total 144 [2022-12-14 12:20:18,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673353796] [2022-12-14 12:20:18,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:20:18,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-12-14 12:20:18,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:20:18,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-12-14 12:20:18,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5344, Invalid=17006, Unknown=0, NotChecked=0, Total=22350 [2022-12-14 12:20:18,730 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand has 145 states, 145 states have (on average 1.9793103448275862) internal successors, (287), 144 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:22,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:20:22,181 INFO L93 Difference]: Finished difference Result 503 states and 505 transitions. [2022-12-14 12:20:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-12-14 12:20:22,181 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.9793103448275862) internal successors, (287), 144 states have internal predecessors, (287), 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 285 [2022-12-14 12:20:22,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:20:22,182 INFO L225 Difference]: With dead ends: 503 [2022-12-14 12:20:22,182 INFO L226 Difference]: Without dead ends: 287 [2022-12-14 12:20:22,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1067 GetRequests, 706 SyntacticMatches, 142 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18877 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=10598, Invalid=38022, Unknown=0, NotChecked=0, Total=48620 [2022-12-14 12:20:22,184 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 4 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:20:22,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 804 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:20:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-12-14 12:20:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-12-14 12:20:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.006993006993007) internal successors, (288), 286 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2022-12-14 12:20:22,286 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 285 [2022-12-14 12:20:22,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:20:22,286 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2022-12-14 12:20:22,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.9793103448275862) internal successors, (287), 144 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:22,286 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2022-12-14 12:20:22,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-12-14 12:20:22,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:20:22,287 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1] [2022-12-14 12:20:22,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-12-14 12:20:22,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:22,488 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:20:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:20:22,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1458826441, now seen corresponding path program 140 times [2022-12-14 12:20:22,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:20:22,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360318695] [2022-12-14 12:20:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:20:22,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:20:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:20:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2485 proven. 7456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:26,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:20:26,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360318695] [2022-12-14 12:20:26,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360318695] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:20:26,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487241393] [2022-12-14 12:20:26,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:20:26,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:26,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:20:26,596 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:20:26,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-12-14 12:20:27,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2022-12-14 12:20:27,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:20:27,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 148 conjunts are in the unsatisfiable core [2022-12-14 12:20:27,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:20:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2556 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:27,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:20:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2556 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:30,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487241393] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:20:30,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175328070] [2022-12-14 12:20:30,389 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:20:30,389 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:20:30,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:20:30,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:20:30,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:20:30,427 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:20:30,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '228408#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:20:30,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:20:30,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:20:30,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 76 [2022-12-14 12:20:30,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671977429] [2022-12-14 12:20:30,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:20:30,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-14 12:20:30,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:20:30,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-14 12:20:30,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2730, Invalid=3912, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 12:20:30,697 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand has 77 states, 77 states have (on average 3.7662337662337664) internal successors, (290), 76 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:20:32,464 INFO L93 Difference]: Finished difference Result 298 states and 299 transitions. [2022-12-14 12:20:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-12-14 12:20:32,465 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.7662337662337664) internal successors, (290), 76 states have internal predecessors, (290), 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 286 [2022-12-14 12:20:32,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:20:32,465 INFO L225 Difference]: With dead ends: 298 [2022-12-14 12:20:32,465 INFO L226 Difference]: Without dead ends: 296 [2022-12-14 12:20:32,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 778 SyntacticMatches, 142 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11366 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8281, Invalid=15589, Unknown=0, NotChecked=0, Total=23870 [2022-12-14 12:20:32,467 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 150 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:20:32,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 14 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:20:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-12-14 12:20:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 290. [2022-12-14 12:20:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0069204152249136) internal successors, (291), 289 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 12:20:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 291 transitions. [2022-12-14 12:20:32,575 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 291 transitions. Word has length 286 [2022-12-14 12:20:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:20:32,576 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 291 transitions. [2022-12-14 12:20:32,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.7662337662337664) internal successors, (290), 76 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 291 transitions. [2022-12-14 12:20:32,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-12-14 12:20:32,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:20:32,576 INFO L195 NwaCegarLoop]: trace histogram [72, 71, 71, 71, 1, 1, 1, 1] [2022-12-14 12:20:32,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-12-14 12:20:32,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:32,777 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:20:32,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:20:32,778 INFO L85 PathProgramCache]: Analyzing trace with hash -870744112, now seen corresponding path program 141 times [2022-12-14 12:20:32,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:20:32,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42319773] [2022-12-14 12:20:32,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:20:32,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:20:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:20:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7597 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:38,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:20:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42319773] [2022-12-14 12:20:38,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42319773] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:20:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522192428] [2022-12-14 12:20:38,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:20:38,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:38,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:20:38,704 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:20:38,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-12-14 12:20:38,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:20:38,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:20:38,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 146 conjunts are in the unsatisfiable core [2022-12-14 12:20:38,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:20:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7597 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:39,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:20:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7597 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:42,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522192428] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:20:42,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535979759] [2022-12-14 12:20:42,859 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:20:42,860 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:20:42,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:20:42,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:20:42,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:20:42,898 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:20:43,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '231455#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:20:43,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:20:43,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:20:43,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145, 145] total 146 [2022-12-14 12:20:43,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149549516] [2022-12-14 12:20:43,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:20:43,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-12-14 12:20:43,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:20:43,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-12-14 12:20:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5491, Invalid=17461, Unknown=0, NotChecked=0, Total=22952 [2022-12-14 12:20:43,295 INFO L87 Difference]: Start difference. First operand 290 states and 291 transitions. Second operand has 147 states, 147 states have (on average 1.9795918367346939) internal successors, (291), 146 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 12:20:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:20:46,394 INFO L93 Difference]: Finished difference Result 510 states and 512 transitions. [2022-12-14 12:20:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-12-14 12:20:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9795918367346939) internal successors, (291), 146 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) Word has length 289 [2022-12-14 12:20:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:20:46,394 INFO L225 Difference]: With dead ends: 510 [2022-12-14 12:20:46,394 INFO L226 Difference]: Without dead ends: 291 [2022-12-14 12:20:46,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 716 SyntacticMatches, 144 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19395 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=10891, Invalid=39061, Unknown=0, NotChecked=0, Total=49952 [2022-12-14 12:20:46,397 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 4 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:20:46,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 869 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:20:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-12-14 12:20:46,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-12-14 12:20:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.006896551724138) internal successors, (292), 290 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2022-12-14 12:20:46,501 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 289 [2022-12-14 12:20:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:20:46,502 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2022-12-14 12:20:46,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9795918367346939) internal successors, (291), 146 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 12:20:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2022-12-14 12:20:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-12-14 12:20:46,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:20:46,502 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1] [2022-12-14 12:20:46,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-12-14 12:20:46,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2022-12-14 12:20:46,704 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:20:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:20:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash -659270491, now seen corresponding path program 142 times [2022-12-14 12:20:46,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:20:46,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974699374] [2022-12-14 12:20:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:20:46,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:20:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:20:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2556 proven. 7669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:50,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:20:50,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974699374] [2022-12-14 12:20:50,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974699374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:20:50,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061525520] [2022-12-14 12:20:50,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:20:50,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:50,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:20:50,823 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:20:50,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-12-14 12:20:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:20:51,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 150 conjunts are in the unsatisfiable core [2022-12-14 12:20:51,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:20:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2628 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:51,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:20:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2628 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:20:54,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061525520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:20:54,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [703802700] [2022-12-14 12:20:54,132 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:20:54,132 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:20:54,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:20:54,132 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:20:54,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:20:54,172 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:20:54,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '234794#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:20:54,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:20:54,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:20:54,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 77 [2022-12-14 12:20:54,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297564227] [2022-12-14 12:20:54,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:20:54,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-14 12:20:54,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:20:54,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-14 12:20:54,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2804, Invalid=4002, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 12:20:54,537 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand has 78 states, 78 states have (on average 3.769230769230769) internal successors, (294), 77 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:56,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:20:56,290 INFO L93 Difference]: Finished difference Result 302 states and 303 transitions. [2022-12-14 12:20:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-12-14 12:20:56,291 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.769230769230769) internal successors, (294), 77 states have internal predecessors, (294), 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 290 [2022-12-14 12:20:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:20:56,291 INFO L225 Difference]: With dead ends: 302 [2022-12-14 12:20:56,291 INFO L226 Difference]: Without dead ends: 300 [2022-12-14 12:20:56,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1088 GetRequests, 789 SyntacticMatches, 144 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11670 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8505, Invalid=15987, Unknown=0, NotChecked=0, Total=24492 [2022-12-14 12:20:56,292 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 298 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:20:56,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 15 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:20:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-12-14 12:20:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 294. [2022-12-14 12:20:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.006825938566553) internal successors, (295), 293 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 295 transitions. [2022-12-14 12:20:56,400 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 295 transitions. Word has length 290 [2022-12-14 12:20:56,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:20:56,400 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 295 transitions. [2022-12-14 12:20:56,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.769230769230769) internal successors, (294), 77 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:20:56,400 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 295 transitions. [2022-12-14 12:20:56,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-12-14 12:20:56,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:20:56,401 INFO L195 NwaCegarLoop]: trace histogram [73, 72, 72, 72, 1, 1, 1, 1] [2022-12-14 12:20:56,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-12-14 12:20:56,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:56,602 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:20:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:20:56,603 INFO L85 PathProgramCache]: Analyzing trace with hash 563067508, now seen corresponding path program 143 times [2022-12-14 12:20:56,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:20:56,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208148913] [2022-12-14 12:20:56,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:20:56,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:20:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7812 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:03,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:03,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208148913] [2022-12-14 12:21:03,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208148913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:21:03,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478989816] [2022-12-14 12:21:03,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:21:03,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:03,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:03,549 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:03,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-12-14 12:21:03,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2022-12-14 12:21:03,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:21:03,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 148 conjunts are in the unsatisfiable core [2022-12-14 12:21:03,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7812 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:04,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7812 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:07,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478989816] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:07,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1703670740] [2022-12-14 12:21:07,600 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:21:07,600 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:07,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:07,600 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:07,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:07,642 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:08,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '237883#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:21:08,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:08,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:21:08,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147, 147] total 148 [2022-12-14 12:21:08,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846080470] [2022-12-14 12:21:08,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:08,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-12-14 12:21:08,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:08,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-12-14 12:21:08,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5640, Invalid=17922, Unknown=0, NotChecked=0, Total=23562 [2022-12-14 12:21:08,005 INFO L87 Difference]: Start difference. First operand 294 states and 295 transitions. Second operand has 149 states, 149 states have (on average 1.9798657718120805) internal successors, (295), 148 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:11,295 INFO L93 Difference]: Finished difference Result 517 states and 519 transitions. [2022-12-14 12:21:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-12-14 12:21:11,295 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.9798657718120805) internal successors, (295), 148 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2022-12-14 12:21:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:11,296 INFO L225 Difference]: With dead ends: 517 [2022-12-14 12:21:11,296 INFO L226 Difference]: Without dead ends: 295 [2022-12-14 12:21:11,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1097 GetRequests, 726 SyntacticMatches, 146 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19920 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=11188, Invalid=40114, Unknown=0, NotChecked=0, Total=51302 [2022-12-14 12:21:11,298 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 4 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:11,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 643 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:21:11,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-12-14 12:21:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-12-14 12:21:11,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.0068027210884354) internal successors, (296), 294 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2022-12-14 12:21:11,412 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 293 [2022-12-14 12:21:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:11,412 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2022-12-14 12:21:11,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.9798657718120805) internal successors, (295), 148 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2022-12-14 12:21:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-12-14 12:21:11,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:11,413 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1] [2022-12-14 12:21:11,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-12-14 12:21:11,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-12-14 12:21:11,614 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash 140123337, now seen corresponding path program 144 times [2022-12-14 12:21:11,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:11,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370072298] [2022-12-14 12:21:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:11,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2628 proven. 7885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:15,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370072298] [2022-12-14 12:21:15,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370072298] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:21:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542756842] [2022-12-14 12:21:15,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:21:15,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:15,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:15,708 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:15,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-12-14 12:21:15,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:21:15,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:21:15,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 152 conjunts are in the unsatisfiable core [2022-12-14 12:21:15,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2701 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:16,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2701 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:18,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542756842] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:18,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [308999653] [2022-12-14 12:21:18,865 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:21:18,866 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:18,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:18,866 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:18,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:18,905 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:19,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '241268#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:21:19,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:19,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:21:19,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 78 [2022-12-14 12:21:19,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963145865] [2022-12-14 12:21:19,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-14 12:21:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-14 12:21:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2879, Invalid=4093, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 12:21:19,248 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand has 79 states, 79 states have (on average 3.7721518987341773) internal successors, (298), 78 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:20,658 INFO L93 Difference]: Finished difference Result 306 states and 307 transitions. [2022-12-14 12:21:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-14 12:21:20,658 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.7721518987341773) internal successors, (298), 78 states have internal predecessors, (298), 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 294 [2022-12-14 12:21:20,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:20,658 INFO L225 Difference]: With dead ends: 306 [2022-12-14 12:21:20,658 INFO L226 Difference]: Without dead ends: 304 [2022-12-14 12:21:20,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1103 GetRequests, 800 SyntacticMatches, 146 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11978 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8732, Invalid=16390, Unknown=0, NotChecked=0, Total=25122 [2022-12-14 12:21:20,660 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 154 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:20,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 20 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:21:20,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-12-14 12:21:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2022-12-14 12:21:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.0067340067340067) internal successors, (299), 297 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2022-12-14 12:21:20,776 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 294 [2022-12-14 12:21:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:20,776 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2022-12-14 12:21:20,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.7721518987341773) internal successors, (298), 78 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2022-12-14 12:21:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-12-14 12:21:20,777 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:20,777 INFO L195 NwaCegarLoop]: trace histogram [74, 73, 73, 73, 1, 1, 1, 1] [2022-12-14 12:21:20,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-12-14 12:21:20,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:20,978 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash -289058864, now seen corresponding path program 145 times [2022-12-14 12:21:20,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:20,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32617069] [2022-12-14 12:21:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:20,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 8030 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:27,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:27,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32617069] [2022-12-14 12:21:27,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32617069] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:21:27,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29575807] [2022-12-14 12:21:27,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:21:27,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:27,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:27,041 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:27,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-12-14 12:21:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:27,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 150 conjunts are in the unsatisfiable core [2022-12-14 12:21:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 8030 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:27,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 8030 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:31,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29575807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:31,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [988612227] [2022-12-14 12:21:31,085 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:21:31,085 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:31,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:31,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:31,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:31,127 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:31,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '244399#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:21:31,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:31,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:21:31,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149, 149] total 150 [2022-12-14 12:21:31,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382231568] [2022-12-14 12:21:31,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:31,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-12-14 12:21:31,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:31,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-12-14 12:21:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5791, Invalid=18389, Unknown=0, NotChecked=0, Total=24180 [2022-12-14 12:21:31,655 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 150 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:34,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:34,899 INFO L93 Difference]: Finished difference Result 524 states and 526 transitions. [2022-12-14 12:21:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-12-14 12:21:34,899 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 150 states have internal predecessors, (299), 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 297 [2022-12-14 12:21:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:34,900 INFO L225 Difference]: With dead ends: 524 [2022-12-14 12:21:34,900 INFO L226 Difference]: Without dead ends: 299 [2022-12-14 12:21:34,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 736 SyntacticMatches, 148 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20452 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=11489, Invalid=41181, Unknown=0, NotChecked=0, Total=52670 [2022-12-14 12:21:34,902 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 4 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:34,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 723 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:21:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-14 12:21:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-12-14 12:21:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0067114093959733) internal successors, (300), 298 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2022-12-14 12:21:35,022 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 297 [2022-12-14 12:21:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:35,022 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2022-12-14 12:21:35,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 150 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2022-12-14 12:21:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-12-14 12:21:35,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:35,023 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1] [2022-12-14 12:21:35,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-12-14 12:21:35,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-12-14 12:21:35,224 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:35,225 INFO L85 PathProgramCache]: Analyzing trace with hash -902004827, now seen corresponding path program 146 times [2022-12-14 12:21:35,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:35,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891074958] [2022-12-14 12:21:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:35,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2701 proven. 8104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:39,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:39,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891074958] [2022-12-14 12:21:39,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891074958] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:21:39,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444026348] [2022-12-14 12:21:39,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:21:39,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:39,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:39,448 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:39,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-12-14 12:21:39,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 74 check-sat command(s) [2022-12-14 12:21:39,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:21:39,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 154 conjunts are in the unsatisfiable core [2022-12-14 12:21:39,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2775 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:40,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2775 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:43,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444026348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:43,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [241540111] [2022-12-14 12:21:43,737 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:21:43,737 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:43,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:43,737 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:43,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:43,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:44,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '247830#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:21:44,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:44,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:21:44,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 79 [2022-12-14 12:21:44,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951498285] [2022-12-14 12:21:44,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:44,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-12-14 12:21:44,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:44,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-12-14 12:21:44,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2955, Invalid=4185, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 12:21:44,231 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand has 80 states, 80 states have (on average 3.775) internal successors, (302), 79 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:46,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:46,111 INFO L93 Difference]: Finished difference Result 310 states and 311 transitions. [2022-12-14 12:21:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-12-14 12:21:46,111 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.775) internal successors, (302), 79 states have internal predecessors, (302), 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 298 [2022-12-14 12:21:46,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:46,112 INFO L225 Difference]: With dead ends: 310 [2022-12-14 12:21:46,112 INFO L226 Difference]: Without dead ends: 308 [2022-12-14 12:21:46,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 811 SyntacticMatches, 148 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12290 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8962, Invalid=16798, Unknown=0, NotChecked=0, Total=25760 [2022-12-14 12:21:46,114 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 304 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:46,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 17 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:21:46,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-12-14 12:21:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 302. [2022-12-14 12:21:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.0066445182724253) internal successors, (303), 301 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 303 transitions. [2022-12-14 12:21:46,235 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 303 transitions. Word has length 298 [2022-12-14 12:21:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:46,235 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 303 transitions. [2022-12-14 12:21:46,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.775) internal successors, (302), 79 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 303 transitions. [2022-12-14 12:21:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-12-14 12:21:46,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:46,236 INFO L195 NwaCegarLoop]: trace histogram [75, 74, 74, 74, 1, 1, 1, 1] [2022-12-14 12:21:46,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-12-14 12:21:46,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-12-14 12:21:46,437 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:46,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1989390196, now seen corresponding path program 147 times [2022-12-14 12:21:46,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:46,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259107018] [2022-12-14 12:21:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:46,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8251 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:53,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:53,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259107018] [2022-12-14 12:21:53,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259107018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:21:53,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914262695] [2022-12-14 12:21:53,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:21:53,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:53,708 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:53,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-12-14 12:21:53,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:21:53,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:21:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 152 conjunts are in the unsatisfiable core [2022-12-14 12:21:53,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8251 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:54,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8251 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:21:58,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914262695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:58,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422699362] [2022-12-14 12:21:58,523 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:21:58,523 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:58,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:58,523 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:58,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:58,569 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:59,232 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '251003#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:21:59,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:59,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:21:59,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151, 151] total 152 [2022-12-14 12:21:59,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615618679] [2022-12-14 12:21:59,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:59,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-12-14 12:21:59,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:59,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-12-14 12:21:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5944, Invalid=18862, Unknown=0, NotChecked=0, Total=24806 [2022-12-14 12:21:59,236 INFO L87 Difference]: Start difference. First operand 302 states and 303 transitions. Second operand has 153 states, 153 states have (on average 1.9803921568627452) internal successors, (303), 152 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:03,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:03,076 INFO L93 Difference]: Finished difference Result 531 states and 533 transitions. [2022-12-14 12:22:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-12-14 12:22:03,076 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.9803921568627452) internal successors, (303), 152 states have internal predecessors, (303), 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 301 [2022-12-14 12:22:03,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:03,077 INFO L225 Difference]: With dead ends: 531 [2022-12-14 12:22:03,077 INFO L226 Difference]: Without dead ends: 303 [2022-12-14 12:22:03,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1127 GetRequests, 746 SyntacticMatches, 150 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20991 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=11794, Invalid=42262, Unknown=0, NotChecked=0, Total=54056 [2022-12-14 12:22:03,080 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:03,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 709 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:22:03,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-12-14 12:22:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-12-14 12:22:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.0066225165562914) internal successors, (304), 302 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2022-12-14 12:22:03,204 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 301 [2022-12-14 12:22:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:03,204 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2022-12-14 12:22:03,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.9803921568627452) internal successors, (303), 152 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2022-12-14 12:22:03,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-12-14 12:22:03,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:03,205 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1] [2022-12-14 12:22:03,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-12-14 12:22:03,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:03,406 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:22:03,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:03,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1620372681, now seen corresponding path program 148 times [2022-12-14 12:22:03,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:22:03,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845729072] [2022-12-14 12:22:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:03,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:22:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2775 proven. 8326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:07,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:22:07,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845729072] [2022-12-14 12:22:07,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845729072] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:22:07,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144713078] [2022-12-14 12:22:07,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:22:07,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:07,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:22:07,576 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:22:07,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-12-14 12:22:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:07,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 156 conjunts are in the unsatisfiable core [2022-12-14 12:22:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2850 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:07,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2850 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:10,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144713078] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:22:10,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217991205] [2022-12-14 12:22:10,362 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:22:10,362 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:22:10,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:22:10,362 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:22:10,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:22:10,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:22:10,727 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '254480#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:22:10,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:22:10,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:22:10,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 80 [2022-12-14 12:22:10,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835127284] [2022-12-14 12:22:10,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:22:10,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-12-14 12:22:10,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:22:10,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-12-14 12:22:10,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3032, Invalid=4278, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 12:22:10,729 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand has 81 states, 81 states have (on average 3.7777777777777777) internal successors, (306), 80 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:12,135 INFO L93 Difference]: Finished difference Result 314 states and 315 transitions. [2022-12-14 12:22:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-12-14 12:22:12,135 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.7777777777777777) internal successors, (306), 80 states have internal predecessors, (306), 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 302 [2022-12-14 12:22:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:12,136 INFO L225 Difference]: With dead ends: 314 [2022-12-14 12:22:12,136 INFO L226 Difference]: Without dead ends: 312 [2022-12-14 12:22:12,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1133 GetRequests, 822 SyntacticMatches, 150 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12606 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9195, Invalid=17211, Unknown=0, NotChecked=0, Total=26406 [2022-12-14 12:22:12,138 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 158 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:12,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 26 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:22:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-12-14 12:22:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 306. [2022-12-14 12:22:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0065573770491802) internal successors, (307), 305 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 307 transitions. [2022-12-14 12:22:12,261 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 307 transitions. Word has length 302 [2022-12-14 12:22:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:12,261 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 307 transitions. [2022-12-14 12:22:12,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.7777777777777777) internal successors, (306), 80 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 307 transitions. [2022-12-14 12:22:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-12-14 12:22:12,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:12,262 INFO L195 NwaCegarLoop]: trace histogram [76, 75, 75, 75, 1, 1, 1, 1] [2022-12-14 12:22:12,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-12-14 12:22:12,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:12,463 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:22:12,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1389920208, now seen corresponding path program 149 times [2022-12-14 12:22:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:22:12,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174971923] [2022-12-14 12:22:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:12,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:22:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8475 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:19,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:22:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174971923] [2022-12-14 12:22:19,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174971923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:22:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202349151] [2022-12-14 12:22:19,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:22:19,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:22:19,247 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:22:19,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-12-14 12:22:19,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2022-12-14 12:22:19,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:22:19,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 154 conjunts are in the unsatisfiable core [2022-12-14 12:22:19,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8475 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:19,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8475 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:24,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202349151] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:22:24,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1205370665] [2022-12-14 12:22:24,488 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:22:24,488 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:22:24,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:22:24,488 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:22:24,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:22:24,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:22:24,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '257695#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:22:24,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:22:24,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:22:24,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153, 153] total 154 [2022-12-14 12:22:24,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495938495] [2022-12-14 12:22:24,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:22:24,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-12-14 12:22:24,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:22:24,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-12-14 12:22:24,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6099, Invalid=19341, Unknown=0, NotChecked=0, Total=25440 [2022-12-14 12:22:24,976 INFO L87 Difference]: Start difference. First operand 306 states and 307 transitions. Second operand has 155 states, 155 states have (on average 1.9806451612903226) internal successors, (307), 154 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:28,735 INFO L93 Difference]: Finished difference Result 538 states and 540 transitions. [2022-12-14 12:22:28,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-12-14 12:22:28,735 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.9806451612903226) internal successors, (307), 154 states have internal predecessors, (307), 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 305 [2022-12-14 12:22:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:28,736 INFO L225 Difference]: With dead ends: 538 [2022-12-14 12:22:28,736 INFO L226 Difference]: Without dead ends: 307 [2022-12-14 12:22:28,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 756 SyntacticMatches, 152 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21537 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=12103, Invalid=43357, Unknown=0, NotChecked=0, Total=55460 [2022-12-14 12:22:28,738 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:28,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 805 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:22:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-12-14 12:22:28,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-12-14 12:22:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.0065359477124183) internal successors, (308), 306 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:28,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2022-12-14 12:22:28,855 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 305 [2022-12-14 12:22:28,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:28,855 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2022-12-14 12:22:28,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.9806451612903226) internal successors, (307), 154 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:28,856 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2022-12-14 12:22:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-12-14 12:22:28,856 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:28,856 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1] [2022-12-14 12:22:28,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-12-14 12:22:29,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:29,057 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:22:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1264514395, now seen corresponding path program 150 times [2022-12-14 12:22:29,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:22:29,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207998836] [2022-12-14 12:22:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:29,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:22:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2850 proven. 8551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:33,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:22:33,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207998836] [2022-12-14 12:22:33,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207998836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:22:33,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988068019] [2022-12-14 12:22:33,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:22:33,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:33,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:22:33,617 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:22:33,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-12-14 12:22:33,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:22:33,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:22:33,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 158 conjunts are in the unsatisfiable core [2022-12-14 12:22:33,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2926 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:34,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2926 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:37,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988068019] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:22:37,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1034695975] [2022-12-14 12:22:37,558 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:22:37,558 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:22:37,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:22:37,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:22:37,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:22:37,598 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:22:37,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '261218#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:22:37,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:22:37,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:22:37,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 81 [2022-12-14 12:22:37,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249023103] [2022-12-14 12:22:37,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:22:37,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-12-14 12:22:37,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:22:37,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-12-14 12:22:37,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3110, Invalid=4372, Unknown=0, NotChecked=0, Total=7482 [2022-12-14 12:22:37,845 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand has 82 states, 82 states have (on average 3.7804878048780486) internal successors, (310), 81 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:39,528 INFO L93 Difference]: Finished difference Result 318 states and 319 transitions. [2022-12-14 12:22:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-12-14 12:22:39,528 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.7804878048780486) internal successors, (310), 81 states have internal predecessors, (310), 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 306 [2022-12-14 12:22:39,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:39,529 INFO L225 Difference]: With dead ends: 318 [2022-12-14 12:22:39,529 INFO L226 Difference]: Without dead ends: 316 [2022-12-14 12:22:39,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 833 SyntacticMatches, 152 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12926 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9431, Invalid=17629, Unknown=0, NotChecked=0, Total=27060 [2022-12-14 12:22:39,531 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 314 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:39,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 17 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:22:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-12-14 12:22:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2022-12-14 12:22:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.006472491909385) internal successors, (311), 309 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 311 transitions. [2022-12-14 12:22:39,658 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 311 transitions. Word has length 306 [2022-12-14 12:22:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:39,658 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 311 transitions. [2022-12-14 12:22:39,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.7804878048780486) internal successors, (310), 81 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 311 transitions. [2022-12-14 12:22:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-12-14 12:22:39,659 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:39,659 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 1, 1, 1, 1] [2022-12-14 12:22:39,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-12-14 12:22:39,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:39,860 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:22:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash 14632052, now seen corresponding path program 151 times [2022-12-14 12:22:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:22:39,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924320747] [2022-12-14 12:22:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:22:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8702 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:47,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:22:47,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924320747] [2022-12-14 12:22:47,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924320747] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:22:47,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698942077] [2022-12-14 12:22:47,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:22:47,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:47,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:22:47,764 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:22:47,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-12-14 12:22:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:47,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 156 conjunts are in the unsatisfiable core [2022-12-14 12:22:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8702 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:48,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8702 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:53,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698942077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:22:53,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585247551] [2022-12-14 12:22:53,021 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:22:53,021 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:22:53,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:22:53,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:22:53,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:22:53,060 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:22:53,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '264475#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:22:53,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:22:53,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:22:53,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155, 155] total 156 [2022-12-14 12:22:53,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562395092] [2022-12-14 12:22:53,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:22:53,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-12-14 12:22:53,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:22:53,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-12-14 12:22:53,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6256, Invalid=19826, Unknown=0, NotChecked=0, Total=26082 [2022-12-14 12:22:53,533 INFO L87 Difference]: Start difference. First operand 310 states and 311 transitions. Second operand has 157 states, 157 states have (on average 1.980891719745223) internal successors, (311), 156 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:57,163 INFO L93 Difference]: Finished difference Result 545 states and 547 transitions. [2022-12-14 12:22:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-12-14 12:22:57,164 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 1.980891719745223) internal successors, (311), 156 states have internal predecessors, (311), 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 309 [2022-12-14 12:22:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:57,164 INFO L225 Difference]: With dead ends: 545 [2022-12-14 12:22:57,164 INFO L226 Difference]: Without dead ends: 311 [2022-12-14 12:22:57,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1157 GetRequests, 766 SyntacticMatches, 154 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22090 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=12416, Invalid=44466, Unknown=0, NotChecked=0, Total=56882 [2022-12-14 12:22:57,167 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 4 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:57,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 921 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1890 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:22:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-12-14 12:22:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2022-12-14 12:22:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.0064516129032257) internal successors, (312), 310 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2022-12-14 12:22:57,304 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 309 [2022-12-14 12:22:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:57,304 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2022-12-14 12:22:57,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 1.980891719745223) internal successors, (311), 156 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2022-12-14 12:22:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-12-14 12:22:57,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:57,305 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1] [2022-12-14 12:22:57,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-12-14 12:22:57,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:57,506 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:22:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:57,507 INFO L85 PathProgramCache]: Analyzing trace with hash -485729079, now seen corresponding path program 152 times [2022-12-14 12:22:57,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:22:57,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18139334] [2022-12-14 12:22:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:57,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:22:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 2926 proven. 8779 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:02,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:23:02,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18139334] [2022-12-14 12:23:02,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18139334] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:23:02,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489031788] [2022-12-14 12:23:02,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:23:02,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:23:02,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:23:02,137 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:23:02,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-12-14 12:23:02,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2022-12-14 12:23:02,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:23:02,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 160 conjunts are in the unsatisfiable core [2022-12-14 12:23:02,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 3003 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:02,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 3003 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:23:06,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489031788] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:23:06,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132031473] [2022-12-14 12:23:06,249 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:23:06,249 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:23:06,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:23:06,250 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:23:06,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:23:06,292 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:23:06,685 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '268044#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (< 0 |ULTIMATE.start_main_~k~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 12:23:06,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:23:06,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:23:06,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 82 [2022-12-14 12:23:06,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707148630] [2022-12-14 12:23:06,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:23:06,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-14 12:23:06,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:23:06,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-14 12:23:06,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3189, Invalid=4467, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 12:23:06,687 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand has 83 states, 83 states have (on average 3.783132530120482) internal successors, (314), 82 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:08,262 INFO L93 Difference]: Finished difference Result 322 states and 323 transitions. [2022-12-14 12:23:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-12-14 12:23:08,262 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.783132530120482) internal successors, (314), 82 states have internal predecessors, (314), 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 310 [2022-12-14 12:23:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:08,262 INFO L225 Difference]: With dead ends: 322 [2022-12-14 12:23:08,262 INFO L226 Difference]: Without dead ends: 320 [2022-12-14 12:23:08,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1163 GetRequests, 844 SyntacticMatches, 154 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13250 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9670, Invalid=18052, Unknown=0, NotChecked=0, Total=27722 [2022-12-14 12:23:08,264 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 162 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:08,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 14 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:23:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-12-14 12:23:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 314. [2022-12-14 12:23:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.0063897763578276) internal successors, (315), 313 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 315 transitions. [2022-12-14 12:23:08,387 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 315 transitions. Word has length 310 [2022-12-14 12:23:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:08,387 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 315 transitions. [2022-12-14 12:23:08,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.783132530120482) internal successors, (314), 82 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:23:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 315 transitions. [2022-12-14 12:23:08,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-12-14 12:23:08,388 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:08,388 INFO L195 NwaCegarLoop]: trace histogram [78, 77, 77, 77, 1, 1, 1, 1] [2022-12-14 12:23:08,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-12-14 12:23:08,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c38957-6179-473e-82d7-7b64c728c4a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2022-12-14 12:23:08,589 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:23:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:08,590 INFO L85 PathProgramCache]: Analyzing trace with hash -605351984, now seen corresponding path program 153 times [2022-12-14 12:23:08,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:23:08,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957314425] [2022-12-14 12:23:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:08,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:23:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat