./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:12:05,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:12:05,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:12:05,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:12:05,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:12:05,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:12:05,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:12:05,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:12:05,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:12:05,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:12:05,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:12:05,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:12:05,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:12:05,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:12:05,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:12:05,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:12:05,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:12:05,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:12:05,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:12:05,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:12:05,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:12:05,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:12:05,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:12:05,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:12:05,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:12:05,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:12:05,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:12:05,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:12:05,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:12:05,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:12:05,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:12:05,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:12:05,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:12:05,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:12:05,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:12:05,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:12:05,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:12:05,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:12:05,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:12:05,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:12:05,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:12:05,797 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:12:05,823 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:12:05,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:12:05,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:12:05,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:12:05,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:12:05,826 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:12:05,826 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:12:05,826 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:12:05,826 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:12:05,827 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:12:05,827 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:12:05,827 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:12:05,827 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:12:05,828 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:12:05,828 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:12:05,828 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:12:05,828 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:12:05,829 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:12:05,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:12:05,830 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:12:05,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:12:05,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:12:05,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:12:05,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:12:05,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:12:05,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:12:05,832 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:12:05,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:12:05,832 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:12:05,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:12:05,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:12:05,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:12:05,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:12:05,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:12:05,834 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:12:05,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:12:05,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:12:05,835 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:12:05,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:12:05,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:12:05,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:12:05,836 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_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d [2022-11-19 08:12:06,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:12:06,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:12:06,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:12:06,198 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:12:06,200 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:12:06,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/loops-crafted-1/in-de52.c [2022-11-19 08:12:06,293 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/data/c9200c094/5cb316e95e0041869f9b1ff3d56fb0e4/FLAG06d5b11e7 [2022-11-19 08:12:06,857 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:12:06,858 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/sv-benchmarks/c/loops-crafted-1/in-de52.c [2022-11-19 08:12:06,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/data/c9200c094/5cb316e95e0041869f9b1ff3d56fb0e4/FLAG06d5b11e7 [2022-11-19 08:12:07,214 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/data/c9200c094/5cb316e95e0041869f9b1ff3d56fb0e4 [2022-11-19 08:12:07,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:12:07,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:12:07,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:12:07,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:12:07,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:12:07,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743b9f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07, skipping insertion in model container [2022-11-19 08:12:07,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:12:07,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:12:07,514 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2022-11-19 08:12:07,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:07,555 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:12:07,570 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2022-11-19 08:12:07,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:07,609 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:12:07,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07 WrapperNode [2022-11-19 08:12:07,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:12:07,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:12:07,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:12:07,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:12:07,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,661 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-11-19 08:12:07,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:12:07,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:12:07,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:12:07,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:12:07,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,696 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:12:07,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:12:07,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:12:07,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:12:07,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (1/1) ... [2022-11-19 08:12:07,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:12:07,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:07,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:12:07,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:12:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:12:07,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:12:07,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:12:07,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:12:07,911 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:12:07,914 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:12:08,154 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:12:08,186 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:12:08,186 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-19 08:12:08,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:12:08 BoogieIcfgContainer [2022-11-19 08:12:08,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:12:08,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:12:08,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:12:08,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:12:08,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:12:07" (1/3) ... [2022-11-19 08:12:08,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278d1870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:12:08, skipping insertion in model container [2022-11-19 08:12:08,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:07" (2/3) ... [2022-11-19 08:12:08,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278d1870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:12:08, skipping insertion in model container [2022-11-19 08:12:08,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:12:08" (3/3) ... [2022-11-19 08:12:08,200 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2022-11-19 08:12:08,222 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:12:08,223 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:12:08,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:12:08,287 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;@642e7139, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:12:08,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:12:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:12:08,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:08,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:08,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash -367575822, now seen corresponding path program 1 times [2022-11-19 08:12:08,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:08,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804117210] [2022-11-19 08:12:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:08,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:08,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:08,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804117210] [2022-11-19 08:12:08,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804117210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:08,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:08,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:12:08,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193780349] [2022-11-19 08:12:08,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:08,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:12:08,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:08,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:12:08,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:12:08,755 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:08,862 INFO L93 Difference]: Finished difference Result 27 states and 40 transitions. [2022-11-19 08:12:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:12:08,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:12:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:08,875 INFO L225 Difference]: With dead ends: 27 [2022-11-19 08:12:08,875 INFO L226 Difference]: Without dead ends: 14 [2022-11-19 08:12:08,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:12:08,892 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:08,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 11 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-19 08:12:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-19 08:12:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2022-11-19 08:12:08,945 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 8 [2022-11-19 08:12:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:08,945 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-11-19 08:12:08,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:08,947 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2022-11-19 08:12:08,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:12:08,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:08,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:08,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:12:08,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:08,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1459416652, now seen corresponding path program 1 times [2022-11-19 08:12:08,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:08,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829882525] [2022-11-19 08:12:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:08,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:09,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:09,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829882525] [2022-11-19 08:12:09,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829882525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:09,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:09,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:12:09,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855411661] [2022-11-19 08:12:09,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:09,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:09,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:09,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:09,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:09,106 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-19 08:12:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:09,178 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2022-11-19 08:12:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:12:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:09,181 INFO L225 Difference]: With dead ends: 24 [2022-11-19 08:12:09,182 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 08:12:09,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:09,186 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:09,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:09,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 08:12:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-19 08:12:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2022-11-19 08:12:09,212 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 9 [2022-11-19 08:12:09,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:09,212 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 29 transitions. [2022-11-19 08:12:09,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-19 08:12:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 29 transitions. [2022-11-19 08:12:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:12:09,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:09,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:09,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:12:09,214 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:09,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1489237443, now seen corresponding path program 1 times [2022-11-19 08:12:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:09,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841948668] [2022-11-19 08:12:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:09,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:09,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:09,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841948668] [2022-11-19 08:12:09,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841948668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:09,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:09,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:12:09,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410039439] [2022-11-19 08:12:09,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:09,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:09,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:09,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:09,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:09,296 INFO L87 Difference]: Start difference. First operand 19 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-19 08:12:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:09,375 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2022-11-19 08:12:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:09,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:12:09,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:09,377 INFO L225 Difference]: With dead ends: 30 [2022-11-19 08:12:09,378 INFO L226 Difference]: Without dead ends: 23 [2022-11-19 08:12:09,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:09,380 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:09,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:12:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-19 08:12:09,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-19 08:12:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 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) [2022-11-19 08:12:09,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2022-11-19 08:12:09,396 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 9 [2022-11-19 08:12:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:09,397 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2022-11-19 08:12:09,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-19 08:12:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2022-11-19 08:12:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:12:09,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:09,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:09,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:12:09,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1845245090, now seen corresponding path program 1 times [2022-11-19 08:12:09,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:09,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368328697] [2022-11-19 08:12:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:09,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:12:09,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:09,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368328697] [2022-11-19 08:12:09,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368328697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:09,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:09,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:12:09,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097586100] [2022-11-19 08:12:09,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:09,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:12:09,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:09,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:12:09,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:12:09,535 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-11-19 08:12:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:09,589 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2022-11-19 08:12:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:12:09,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) Word has length 10 [2022-11-19 08:12:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:09,591 INFO L225 Difference]: With dead ends: 29 [2022-11-19 08:12:09,591 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 08:12:09,591 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 [2022-11-19 08:12:09,593 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:09,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:12:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 08:12:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-19 08:12:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2022-11-19 08:12:09,603 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 10 [2022-11-19 08:12:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:09,603 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2022-11-19 08:12:09,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-11-19 08:12:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2022-11-19 08:12:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:12:09,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:09,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:09,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:12:09,605 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:09,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:09,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2090397055, now seen corresponding path program 1 times [2022-11-19 08:12:09,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:09,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066847682] [2022-11-19 08:12:09,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:09,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:09,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066847682] [2022-11-19 08:12:09,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066847682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:09,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289716548] [2022-11-19 08:12:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:09,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:09,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:09,742 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:09,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:12:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:09,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:12:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:09,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:09,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289716548] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:09,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:09,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-11-19 08:12:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58704885] [2022-11-19 08:12:09,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:09,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:12:09,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:09,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:12:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:12:09,989 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:10,042 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2022-11-19 08:12:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:12:10,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 11 [2022-11-19 08:12:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:10,045 INFO L225 Difference]: With dead ends: 25 [2022-11-19 08:12:10,047 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 08:12:10,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:12:10,049 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:10,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:12:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 08:12:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-19 08:12:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2022-11-19 08:12:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2022-11-19 08:12:10,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 11 [2022-11-19 08:12:10,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:10,068 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2022-11-19 08:12:10,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2022-11-19 08:12:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:12:10,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:10,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:10,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:12:10,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:10,275 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:10,275 INFO L85 PathProgramCache]: Analyzing trace with hash 235437997, now seen corresponding path program 1 times [2022-11-19 08:12:10,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:10,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116558936] [2022-11-19 08:12:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:10,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:10,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:10,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116558936] [2022-11-19 08:12:10,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116558936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:10,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011165290] [2022-11-19 08:12:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:10,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:10,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:10,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:10,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:12:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:10,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:12:10,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:12:10,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:10,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011165290] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:10,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:10,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2022-11-19 08:12:10,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979116461] [2022-11-19 08:12:10,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:10,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:12:10,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:10,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:12:10,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:12:10,607 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:10,652 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-11-19 08:12:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:12:10,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 11 [2022-11-19 08:12:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:10,653 INFO L225 Difference]: With dead ends: 20 [2022-11-19 08:12:10,653 INFO L226 Difference]: Without dead ends: 14 [2022-11-19 08:12:10,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:12:10,663 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:10,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:12:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-19 08:12:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-19 08:12:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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) [2022-11-19 08:12:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2022-11-19 08:12:10,680 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2022-11-19 08:12:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:10,681 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2022-11-19 08:12:10,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2022-11-19 08:12:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:12:10,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:10,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:10,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:10,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:10,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:10,890 INFO L85 PathProgramCache]: Analyzing trace with hash 86783420, now seen corresponding path program 1 times [2022-11-19 08:12:10,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:10,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037400171] [2022-11-19 08:12:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:10,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:12:11,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:11,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037400171] [2022-11-19 08:12:11,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037400171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:11,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168771411] [2022-11-19 08:12:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:11,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:11,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:11,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:11,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:12:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:11,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:12:11,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:11,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:12:11,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168771411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:11,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2009454692] [2022-11-19 08:12:11,424 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:11,424 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:11,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:11,434 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:11,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:11,814 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:11,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '702#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:11,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:11,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:11,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-19 08:12:11,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992388519] [2022-11-19 08:12:11,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:12,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:12:12,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:12,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:12:12,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:12:12,001 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:12,454 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2022-11-19 08:12:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:12:12,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 12 [2022-11-19 08:12:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:12,457 INFO L225 Difference]: With dead ends: 51 [2022-11-19 08:12:12,458 INFO L226 Difference]: Without dead ends: 38 [2022-11-19 08:12:12,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:12:12,459 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:12,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 21 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-19 08:12:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2022-11-19 08:12:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-11-19 08:12:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-11-19 08:12:12,481 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-11-19 08:12:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:12,481 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-11-19 08:12:12,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-11-19 08:12:12,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:12:12,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:12,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:12,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:12,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:12,689 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash 116604211, now seen corresponding path program 1 times [2022-11-19 08:12:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:12,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029110125] [2022-11-19 08:12:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:12,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:12,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:12,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029110125] [2022-11-19 08:12:12,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029110125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:12,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015469691] [2022-11-19 08:12:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:12,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:12,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:12,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:12,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:12:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:12,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:12:12,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:12,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:12,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015469691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:12,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391122972] [2022-11-19 08:12:12,985 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:12,985 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:12,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:12,986 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:12,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:13,171 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:13,272 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '925#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:13,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:13,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:13,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-19 08:12:13,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116217640] [2022-11-19 08:12:13,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:13,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:12:13,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:13,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:12:13,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:12:13,274 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:13,335 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-11-19 08:12:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:12:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) Word has length 12 [2022-11-19 08:12:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:13,336 INFO L225 Difference]: With dead ends: 40 [2022-11-19 08:12:13,336 INFO L226 Difference]: Without dead ends: 33 [2022-11-19 08:12:13,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:12:13,338 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:13,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:12:13,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-19 08:12:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-19 08:12:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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) [2022-11-19 08:12:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2022-11-19 08:12:13,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 12 [2022-11-19 08:12:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:13,355 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2022-11-19 08:12:13,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:13,355 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2022-11-19 08:12:13,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:12:13,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:13,356 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:13,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:13,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:13,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:13,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:13,562 INFO L85 PathProgramCache]: Analyzing trace with hash 843996659, now seen corresponding path program 1 times [2022-11-19 08:12:13,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:13,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094862609] [2022-11-19 08:12:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:13,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:12:13,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:13,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094862609] [2022-11-19 08:12:13,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094862609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:13,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958358336] [2022-11-19 08:12:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:13,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:13,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:13,682 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:13,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:12:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:13,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:12:13,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:12:13,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:12:13,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958358336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:13,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1103731190] [2022-11-19 08:12:13,819 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:13,819 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:13,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:13,820 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:13,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:13,992 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:14,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1145#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:14,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:14,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:14,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-19 08:12:14,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835655614] [2022-11-19 08:12:14,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:14,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:12:14,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:12:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:12:14,107 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-19 08:12:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:14,168 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2022-11-19 08:12:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:12:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 14 [2022-11-19 08:12:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:14,177 INFO L225 Difference]: With dead ends: 41 [2022-11-19 08:12:14,177 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 08:12:14,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:12:14,180 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:14,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:12:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 08:12:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 08:12:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 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) [2022-11-19 08:12:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-11-19 08:12:14,196 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 14 [2022-11-19 08:12:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:14,197 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-11-19 08:12:14,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-19 08:12:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-11-19 08:12:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:12:14,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:14,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:14,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:14,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:14,405 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:14,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:14,405 INFO L85 PathProgramCache]: Analyzing trace with hash -384821598, now seen corresponding path program 2 times [2022-11-19 08:12:14,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:14,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859589297] [2022-11-19 08:12:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:14,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:12:14,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:14,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859589297] [2022-11-19 08:12:14,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859589297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669430870] [2022-11-19 08:12:14,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:14,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:14,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:14,534 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:14,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:12:14,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:12:14,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:14,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:12:14,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:12:14,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:12:14,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669430870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:14,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1963472152] [2022-11-19 08:12:14,803 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:14,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:14,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:14,804 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:14,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:14,942 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:15,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1364#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:15,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:15,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:15,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 15 [2022-11-19 08:12:15,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218456595] [2022-11-19 08:12:15,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:15,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:12:15,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:15,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:12:15,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:12:15,110 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2022-11-19 08:12:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:15,639 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2022-11-19 08:12:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:12:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) Word has length 14 [2022-11-19 08:12:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:15,642 INFO L225 Difference]: With dead ends: 78 [2022-11-19 08:12:15,642 INFO L226 Difference]: Without dead ends: 58 [2022-11-19 08:12:15,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:12:15,643 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:15,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:12:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-19 08:12:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2022-11-19 08:12:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 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) [2022-11-19 08:12:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 59 transitions. [2022-11-19 08:12:15,675 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 59 transitions. Word has length 14 [2022-11-19 08:12:15,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:15,675 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 59 transitions. [2022-11-19 08:12:15,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2022-11-19 08:12:15,676 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 59 transitions. [2022-11-19 08:12:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:12:15,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:15,677 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:15,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 08:12:15,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:12:15,883 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:15,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:15,884 INFO L85 PathProgramCache]: Analyzing trace with hash 722354636, now seen corresponding path program 3 times [2022-11-19 08:12:15,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:15,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258546669] [2022-11-19 08:12:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:15,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:12:16,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:16,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258546669] [2022-11-19 08:12:16,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258546669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:16,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997244526] [2022-11-19 08:12:16,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:12:16,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:16,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:16,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:16,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:12:16,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:12:16,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:16,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:12:16,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:12:16,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:12:16,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997244526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:16,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [10501328] [2022-11-19 08:12:16,287 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:16,288 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:16,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:16,288 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:16,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:16,460 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:16,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1686#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:16,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:16,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:16,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2022-11-19 08:12:16,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086125235] [2022-11-19 08:12:16,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:16,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:12:16,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:12:16,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:12:16,664 INFO L87 Difference]: Start difference. First operand 40 states and 59 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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) [2022-11-19 08:12:17,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:17,323 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2022-11-19 08:12:17,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:12:17,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 15 [2022-11-19 08:12:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:17,324 INFO L225 Difference]: With dead ends: 73 [2022-11-19 08:12:17,324 INFO L226 Difference]: Without dead ends: 53 [2022-11-19 08:12:17,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:12:17,325 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:17,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-19 08:12:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2022-11-19 08:12:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2022-11-19 08:12:17,350 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 15 [2022-11-19 08:12:17,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:17,350 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2022-11-19 08:12:17,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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) [2022-11-19 08:12:17,351 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2022-11-19 08:12:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:12:17,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:17,352 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:17,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 08:12:17,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 08:12:17,557 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1711438177, now seen corresponding path program 2 times [2022-11-19 08:12:17,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:17,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725217453] [2022-11-19 08:12:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:17,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:17,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:17,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725217453] [2022-11-19 08:12:17,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725217453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:17,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467006162] [2022-11-19 08:12:17,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:17,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:17,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:17,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:12:17,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:12:17,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:17,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:12:17,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:12:17,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:12:18,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467006162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:18,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [543327268] [2022-11-19 08:12:18,097 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:18,097 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:18,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:18,097 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:18,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:18,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:18,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2061#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:18,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:18,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:18,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-11-19 08:12:18,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909883676] [2022-11-19 08:12:18,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:18,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:12:18,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:18,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:12:18,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:12:18,428 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:20,151 INFO L93 Difference]: Finished difference Result 139 states and 191 transitions. [2022-11-19 08:12:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-19 08:12:20,152 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 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 15 [2022-11-19 08:12:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:20,152 INFO L225 Difference]: With dead ends: 139 [2022-11-19 08:12:20,152 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 08:12:20,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=305, Invalid=2451, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 08:12:20,155 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 109 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:20,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 124 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:12:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 08:12:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2022-11-19 08:12:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 67 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) [2022-11-19 08:12:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2022-11-19 08:12:20,211 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 15 [2022-11-19 08:12:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:20,212 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2022-11-19 08:12:20,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2022-11-19 08:12:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:12:20,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:20,214 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:20,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:20,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:20,421 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:20,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1841787794, now seen corresponding path program 3 times [2022-11-19 08:12:20,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:20,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693624419] [2022-11-19 08:12:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:20,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:12:20,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693624419] [2022-11-19 08:12:20,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693624419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059616715] [2022-11-19 08:12:20,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:12:20,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:20,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:20,590 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:20,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:12:20,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:12:20,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:20,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:12:20,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:12:20,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:12:20,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059616715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:20,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [366821667] [2022-11-19 08:12:20,777 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:20,777 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:20,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:20,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:20,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:20,910 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:21,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2600#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:21,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:21,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:21,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-11-19 08:12:21,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745634235] [2022-11-19 08:12:21,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:21,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:12:21,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:12:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:12:21,018 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:21,146 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2022-11-19 08:12:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:12:21,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 16 [2022-11-19 08:12:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:21,148 INFO L225 Difference]: With dead ends: 76 [2022-11-19 08:12:21,148 INFO L226 Difference]: Without dead ends: 68 [2022-11-19 08:12:21,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:12:21,149 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:21,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-19 08:12:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-19 08:12:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 67 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) [2022-11-19 08:12:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2022-11-19 08:12:21,192 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 16 [2022-11-19 08:12:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:21,193 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2022-11-19 08:12:21,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:21,193 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2022-11-19 08:12:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:12:21,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:21,199 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:21,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:21,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:21,404 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:21,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:21,405 INFO L85 PathProgramCache]: Analyzing trace with hash -85029497, now seen corresponding path program 2 times [2022-11-19 08:12:21,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:21,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66320891] [2022-11-19 08:12:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:21,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:12:21,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:21,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66320891] [2022-11-19 08:12:21,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66320891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086130985] [2022-11-19 08:12:21,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:21,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:21,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:21,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:21,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:12:21,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:12:21,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:12:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:12:21,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:12:22,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086130985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:22,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1413331082] [2022-11-19 08:12:22,010 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:22,010 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:22,010 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:22,010 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:22,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:22,165 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:22,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2997#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:22,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:22,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:22,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 19 [2022-11-19 08:12:22,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024503] [2022-11-19 08:12:22,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:22,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 08:12:22,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 08:12:22,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:12:22,338 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:24,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:24,302 INFO L93 Difference]: Finished difference Result 154 states and 215 transitions. [2022-11-19 08:12:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 08:12:24,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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 17 [2022-11-19 08:12:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:24,303 INFO L225 Difference]: With dead ends: 154 [2022-11-19 08:12:24,303 INFO L226 Difference]: Without dead ends: 115 [2022-11-19 08:12:24,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=384, Invalid=2372, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 08:12:24,305 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:24,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 86 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:12:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-19 08:12:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 73. [2022-11-19 08:12:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 72 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 101 transitions. [2022-11-19 08:12:24,338 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 101 transitions. Word has length 17 [2022-11-19 08:12:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:24,339 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 101 transitions. [2022-11-19 08:12:24,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 101 transitions. [2022-11-19 08:12:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:12:24,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:24,340 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:24,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:24,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:12:24,545 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash 759497404, now seen corresponding path program 4 times [2022-11-19 08:12:24,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:24,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356536691] [2022-11-19 08:12:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:24,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:12:24,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:24,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356536691] [2022-11-19 08:12:24,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356536691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:24,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612202863] [2022-11-19 08:12:24,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:24,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:24,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:24,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:24,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:12:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:12:24,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:12:24,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:12:24,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612202863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:24,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1953163188] [2022-11-19 08:12:24,987 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:24,987 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:24,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:24,988 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:24,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:25,137 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:25,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3605#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:25,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:25,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:25,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-11-19 08:12:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595878772] [2022-11-19 08:12:25,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:25,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:12:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:12:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:12:25,311 INFO L87 Difference]: Start difference. First operand 73 states and 101 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2022-11-19 08:12:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:27,170 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2022-11-19 08:12:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-19 08:12:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 08:12:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:27,172 INFO L225 Difference]: With dead ends: 138 [2022-11-19 08:12:27,172 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 08:12:27,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=394, Invalid=3146, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 08:12:27,174 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 76 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:27,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 43 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:12:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 08:12:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2022-11-19 08:12:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.4069767441860466) internal successors, (121), 86 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 121 transitions. [2022-11-19 08:12:27,216 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 121 transitions. Word has length 18 [2022-11-19 08:12:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:27,216 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 121 transitions. [2022-11-19 08:12:27,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2022-11-19 08:12:27,216 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 121 transitions. [2022-11-19 08:12:27,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:12:27,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:27,219 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:27,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:27,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:12:27,454 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:27,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:27,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1615552141, now seen corresponding path program 4 times [2022-11-19 08:12:27,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:27,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156296628] [2022-11-19 08:12:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:27,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:27,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:27,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156296628] [2022-11-19 08:12:27,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156296628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:27,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71082847] [2022-11-19 08:12:27,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:27,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:27,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:27,692 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:27,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:12:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:27,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:12:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:12:27,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:12:27,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71082847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:27,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285002576] [2022-11-19 08:12:27,889 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:27,890 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:27,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:27,891 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:27,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:28,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:28,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4242#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:28,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:28,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:28,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 16 [2022-11-19 08:12:28,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792058440] [2022-11-19 08:12:28,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:28,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 08:12:28,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 08:12:28,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:12:28,187 INFO L87 Difference]: Start difference. First operand 87 states and 121 transitions. Second operand has 16 states, 16 states have (on average 1.9375) 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) [2022-11-19 08:12:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:30,123 INFO L93 Difference]: Finished difference Result 187 states and 259 transitions. [2022-11-19 08:12:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 08:12:30,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) 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 18 [2022-11-19 08:12:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:30,125 INFO L225 Difference]: With dead ends: 187 [2022-11-19 08:12:30,125 INFO L226 Difference]: Without dead ends: 154 [2022-11-19 08:12:30,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=300, Invalid=2562, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 08:12:30,128 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:30,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 108 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:12:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-19 08:12:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2022-11-19 08:12:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 97 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) [2022-11-19 08:12:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 131 transitions. [2022-11-19 08:12:30,182 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 131 transitions. Word has length 18 [2022-11-19 08:12:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:30,183 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 131 transitions. [2022-11-19 08:12:30,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) 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) [2022-11-19 08:12:30,183 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 131 transitions. [2022-11-19 08:12:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:12:30,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:30,184 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:30,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:30,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:30,393 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:30,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:30,394 INFO L85 PathProgramCache]: Analyzing trace with hash 962312748, now seen corresponding path program 3 times [2022-11-19 08:12:30,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:30,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539500710] [2022-11-19 08:12:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:30,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:12:30,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:30,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539500710] [2022-11-19 08:12:30,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539500710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:30,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041766423] [2022-11-19 08:12:30,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:12:30,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:30,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:30,610 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:30,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:12:30,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:12:30,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:30,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:12:30,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:12:30,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:12:30,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041766423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:30,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [719151799] [2022-11-19 08:12:30,733 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:30,734 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:30,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:30,734 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:30,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:30,838 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:30,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4974#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:30,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:30,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:30,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-19 08:12:30,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846068430] [2022-11-19 08:12:30,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:30,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:12:30,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:30,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:12:30,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:12:30,964 INFO L87 Difference]: Start difference. First operand 98 states and 131 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-11-19 08:12:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:31,076 INFO L93 Difference]: Finished difference Result 109 states and 144 transitions. [2022-11-19 08:12:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:12:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 19 [2022-11-19 08:12:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:31,078 INFO L225 Difference]: With dead ends: 109 [2022-11-19 08:12:31,078 INFO L226 Difference]: Without dead ends: 91 [2022-11-19 08:12:31,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:12:31,079 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:31,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 15 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-19 08:12:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-19 08:12:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3555555555555556) internal successors, (122), 90 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) [2022-11-19 08:12:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2022-11-19 08:12:31,121 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 19 [2022-11-19 08:12:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:31,122 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2022-11-19 08:12:31,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-11-19 08:12:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2022-11-19 08:12:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:12:31,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:31,123 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:31,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:31,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:12:31,329 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:31,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:31,329 INFO L85 PathProgramCache]: Analyzing trace with hash 784031602, now seen corresponding path program 5 times [2022-11-19 08:12:31,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:31,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225990836] [2022-11-19 08:12:31,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:31,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:12:31,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225990836] [2022-11-19 08:12:31,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225990836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656297763] [2022-11-19 08:12:31,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:31,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:31,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:31,535 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:31,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:12:31,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:12:31,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:12:31,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:12:31,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:12:32,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656297763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:32,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131139206] [2022-11-19 08:12:32,028 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:32,028 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:32,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:32,029 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:32,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:32,164 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:32,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5507#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:32,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:32,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:32,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 25 [2022-11-19 08:12:32,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39069873] [2022-11-19 08:12:32,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:32,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 08:12:32,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:32,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 08:12:32,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:12:32,379 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-11-19 08:12:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:37,083 INFO L93 Difference]: Finished difference Result 231 states and 325 transitions. [2022-11-19 08:12:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-19 08:12:37,083 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) Word has length 20 [2022-11-19 08:12:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:37,084 INFO L225 Difference]: With dead ends: 231 [2022-11-19 08:12:37,084 INFO L226 Difference]: Without dead ends: 188 [2022-11-19 08:12:37,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=857, Invalid=6115, Unknown=0, NotChecked=0, Total=6972 [2022-11-19 08:12:37,088 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:37,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 182 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 08:12:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-19 08:12:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 99. [2022-11-19 08:12:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 98 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 141 transitions. [2022-11-19 08:12:37,132 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 141 transitions. Word has length 20 [2022-11-19 08:12:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:37,133 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 141 transitions. [2022-11-19 08:12:37,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-11-19 08:12:37,133 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 141 transitions. [2022-11-19 08:12:37,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:12:37,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:37,134 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:37,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:37,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:12:37,335 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:37,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:37,335 INFO L85 PathProgramCache]: Analyzing trace with hash 423408972, now seen corresponding path program 6 times [2022-11-19 08:12:37,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:37,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113045008] [2022-11-19 08:12:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:37,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:12:37,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:37,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113045008] [2022-11-19 08:12:37,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113045008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:37,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356653908] [2022-11-19 08:12:37,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:12:37,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:37,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:37,596 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:37,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:12:37,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:12:37,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:37,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:12:37,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:12:37,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:12:37,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356653908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1846017964] [2022-11-19 08:12:37,805 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:37,806 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:37,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:37,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:37,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:37,925 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:38,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6384#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:38,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:38,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:38,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-11-19 08:12:38,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013239583] [2022-11-19 08:12:38,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:38,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 08:12:38,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:38,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 08:12:38,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:12:38,107 INFO L87 Difference]: Start difference. First operand 99 states and 141 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:41,324 INFO L93 Difference]: Finished difference Result 204 states and 307 transitions. [2022-11-19 08:12:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-19 08:12:41,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2022-11-19 08:12:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:41,325 INFO L225 Difference]: With dead ends: 204 [2022-11-19 08:12:41,325 INFO L226 Difference]: Without dead ends: 172 [2022-11-19 08:12:41,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=628, Invalid=5692, Unknown=0, NotChecked=0, Total=6320 [2022-11-19 08:12:41,328 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:41,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 73 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:12:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-19 08:12:41,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2022-11-19 08:12:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.434108527131783) internal successors, (185), 129 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 185 transitions. [2022-11-19 08:12:41,393 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 185 transitions. Word has length 21 [2022-11-19 08:12:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:41,394 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 185 transitions. [2022-11-19 08:12:41,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 185 transitions. [2022-11-19 08:12:41,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:12:41,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:41,395 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:41,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:41,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:41,600 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:41,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:41,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1598829151, now seen corresponding path program 5 times [2022-11-19 08:12:41,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:41,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794518791] [2022-11-19 08:12:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:41,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:41,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:41,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794518791] [2022-11-19 08:12:41,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794518791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:41,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948349526] [2022-11-19 08:12:41,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:41,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:41,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:41,974 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:41,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:12:42,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:12:42,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:12:42,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 08:12:42,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:12:42,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948349526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:42,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424817233] [2022-11-19 08:12:42,288 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:42,288 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:42,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:42,289 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:42,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:42,392 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:42,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7298#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:42,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:42,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:42,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 6] total 23 [2022-11-19 08:12:42,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471443475] [2022-11-19 08:12:42,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:42,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:12:42,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:42,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:12:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:12:42,564 INFO L87 Difference]: Start difference. First operand 130 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2022-11-19 08:12:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:44,248 INFO L93 Difference]: Finished difference Result 287 states and 397 transitions. [2022-11-19 08:12:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-19 08:12:44,248 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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 21 [2022-11-19 08:12:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:44,250 INFO L225 Difference]: With dead ends: 287 [2022-11-19 08:12:44,250 INFO L226 Difference]: Without dead ends: 248 [2022-11-19 08:12:44,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=466, Invalid=2956, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 08:12:44,252 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:44,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 284 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:12:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-19 08:12:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 138. [2022-11-19 08:12:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.3722627737226278) internal successors, (188), 137 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) [2022-11-19 08:12:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 188 transitions. [2022-11-19 08:12:44,309 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 188 transitions. Word has length 21 [2022-11-19 08:12:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:44,310 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 188 transitions. [2022-11-19 08:12:44,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2022-11-19 08:12:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 188 transitions. [2022-11-19 08:12:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:12:44,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:44,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:44,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-19 08:12:44,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:44,511 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2072742099, now seen corresponding path program 4 times [2022-11-19 08:12:44,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699610280] [2022-11-19 08:12:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:44,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:12:44,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:44,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699610280] [2022-11-19 08:12:44,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699610280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:44,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620030404] [2022-11-19 08:12:44,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:44,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:44,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:44,669 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:44,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 08:12:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:44,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:12:44,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:12:44,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:12:44,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620030404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:44,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294202846] [2022-11-19 08:12:44,845 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:44,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:44,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:44,845 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:44,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:44,957 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:45,057 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8304#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:45,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:45,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:45,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-19 08:12:45,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795752098] [2022-11-19 08:12:45,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:45,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:12:45,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:12:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:12:45,059 INFO L87 Difference]: Start difference. First operand 138 states and 188 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:45,257 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2022-11-19 08:12:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:12:45,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2022-11-19 08:12:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:45,259 INFO L225 Difference]: With dead ends: 154 [2022-11-19 08:12:45,259 INFO L226 Difference]: Without dead ends: 142 [2022-11-19 08:12:45,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:12:45,260 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:45,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-19 08:12:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-11-19 08:12:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3546099290780143) internal successors, (191), 141 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) [2022-11-19 08:12:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 191 transitions. [2022-11-19 08:12:45,316 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 191 transitions. Word has length 22 [2022-11-19 08:12:45,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:45,316 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 191 transitions. [2022-11-19 08:12:45,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 191 transitions. [2022-11-19 08:12:45,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:12:45,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:45,317 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:45,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:45,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 08:12:45,517 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:45,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:45,518 INFO L85 PathProgramCache]: Analyzing trace with hash -220541441, now seen corresponding path program 6 times [2022-11-19 08:12:45,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:45,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726016645] [2022-11-19 08:12:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:45,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:12:45,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:45,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726016645] [2022-11-19 08:12:45,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726016645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:45,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275530087] [2022-11-19 08:12:45,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:12:45,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:45,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:45,741 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:45,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 08:12:45,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:12:45,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:45,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:12:45,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:12:45,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:12:45,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275530087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:45,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439585494] [2022-11-19 08:12:45,994 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:45,994 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:45,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:45,995 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:45,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:46,133 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:46,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9048#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:46,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:46,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:46,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-11-19 08:12:46,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733782327] [2022-11-19 08:12:46,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:46,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 08:12:46,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:46,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 08:12:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:12:46,335 INFO L87 Difference]: Start difference. First operand 142 states and 191 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2022-11-19 08:12:49,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:49,020 INFO L93 Difference]: Finished difference Result 226 states and 299 transitions. [2022-11-19 08:12:49,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-19 08:12:49,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 23 [2022-11-19 08:12:49,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:49,022 INFO L225 Difference]: With dead ends: 226 [2022-11-19 08:12:49,022 INFO L226 Difference]: Without dead ends: 196 [2022-11-19 08:12:49,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=387, Invalid=3273, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 08:12:49,024 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 124 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:49,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 102 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:12:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-19 08:12:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2022-11-19 08:12:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3191489361702127) internal successors, (186), 141 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) [2022-11-19 08:12:49,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2022-11-19 08:12:49,099 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 23 [2022-11-19 08:12:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:49,099 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2022-11-19 08:12:49,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2022-11-19 08:12:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2022-11-19 08:12:49,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:12:49,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:49,100 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:49,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:49,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:49,301 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:49,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:49,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1115092589, now seen corresponding path program 5 times [2022-11-19 08:12:49,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:49,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432689332] [2022-11-19 08:12:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:49,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:12:49,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:49,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432689332] [2022-11-19 08:12:49,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432689332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:49,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997807359] [2022-11-19 08:12:49,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:49,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:49,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:49,529 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:49,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 08:12:49,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:12:49,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:49,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:12:49,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:12:49,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:12:49,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997807359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:49,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707747969] [2022-11-19 08:12:49,703 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:49,703 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:49,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:49,704 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:49,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:49,814 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:49,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9991#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:49,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:49,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:49,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2022-11-19 08:12:49,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109133301] [2022-11-19 08:12:49,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:49,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:12:49,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:49,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:12:49,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:12:49,924 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:50,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:50,101 INFO L93 Difference]: Finished difference Result 184 states and 244 transitions. [2022-11-19 08:12:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:12:50,102 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:12:50,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:50,103 INFO L225 Difference]: With dead ends: 184 [2022-11-19 08:12:50,103 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 08:12:50,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:12:50,103 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:50,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 08:12:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2022-11-19 08:12:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.3307692307692307) internal successors, (173), 130 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 173 transitions. [2022-11-19 08:12:50,169 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 173 transitions. Word has length 24 [2022-11-19 08:12:50,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:50,170 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 173 transitions. [2022-11-19 08:12:50,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:50,170 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 173 transitions. [2022-11-19 08:12:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:12:50,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:50,171 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:50,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:50,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:50,375 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:50,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:50,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1323667524, now seen corresponding path program 7 times [2022-11-19 08:12:50,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:50,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661800571] [2022-11-19 08:12:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:50,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:12:50,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:50,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661800571] [2022-11-19 08:12:50,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661800571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745339795] [2022-11-19 08:12:50,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:50,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:50,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:50,687 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:50,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 08:12:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:12:50,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:12:50,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:12:50,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745339795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:50,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158983247] [2022-11-19 08:12:50,945 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:50,945 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:50,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:50,946 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:50,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:51,039 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:51,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10774#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:51,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:51,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:51,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2022-11-19 08:12:51,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675903037] [2022-11-19 08:12:51,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:51,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:12:51,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:51,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:12:51,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:12:51,228 INFO L87 Difference]: Start difference. First operand 131 states and 173 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2022-11-19 08:12:57,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:59,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:59,819 INFO L93 Difference]: Finished difference Result 252 states and 355 transitions. [2022-11-19 08:12:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-19 08:12:59,819 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 24 [2022-11-19 08:12:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:59,820 INFO L225 Difference]: With dead ends: 252 [2022-11-19 08:12:59,821 INFO L226 Difference]: Without dead ends: 219 [2022-11-19 08:12:59,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=928, Invalid=9172, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 08:12:59,824 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 129 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:59,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 89 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-19 08:12:59,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-19 08:12:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 170. [2022-11-19 08:12:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.3254437869822486) internal successors, (224), 169 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) [2022-11-19 08:12:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 224 transitions. [2022-11-19 08:12:59,914 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 224 transitions. Word has length 24 [2022-11-19 08:12:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:59,914 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 224 transitions. [2022-11-19 08:12:59,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2022-11-19 08:12:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 224 transitions. [2022-11-19 08:12:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:12:59,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:59,915 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:59,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:00,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:00,119 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:00,119 INFO L85 PathProgramCache]: Analyzing trace with hash 2034832569, now seen corresponding path program 7 times [2022-11-19 08:13:00,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:00,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068182591] [2022-11-19 08:13:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:00,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:13:00,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:00,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068182591] [2022-11-19 08:13:00,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068182591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:00,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904963180] [2022-11-19 08:13:00,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:13:00,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:00,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:00,423 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:00,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 08:13:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:00,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:13:00,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:13:00,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:13:00,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904963180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:00,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [786978339] [2022-11-19 08:13:00,690 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:13:00,691 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:00,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:00,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:00,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:00,776 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:00,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11918#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:00,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:00,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:00,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2022-11-19 08:13:00,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862547332] [2022-11-19 08:13:00,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:00,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:13:00,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:00,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:13:00,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:13:00,980 INFO L87 Difference]: Start difference. First operand 170 states and 224 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) [2022-11-19 08:13:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:07,543 INFO L93 Difference]: Finished difference Result 341 states and 454 transitions. [2022-11-19 08:13:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-19 08:13:07,543 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) Word has length 24 [2022-11-19 08:13:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:07,545 INFO L225 Difference]: With dead ends: 341 [2022-11-19 08:13:07,545 INFO L226 Difference]: Without dead ends: 291 [2022-11-19 08:13:07,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=712, Invalid=7298, Unknown=0, NotChecked=0, Total=8010 [2022-11-19 08:13:07,548 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 193 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:07,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 266 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:13:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-19 08:13:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 165. [2022-11-19 08:13:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.3109756097560976) internal successors, (215), 164 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) [2022-11-19 08:13:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 215 transitions. [2022-11-19 08:13:07,632 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 215 transitions. Word has length 24 [2022-11-19 08:13:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:07,633 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 215 transitions. [2022-11-19 08:13:07,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) [2022-11-19 08:13:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 215 transitions. [2022-11-19 08:13:07,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:13:07,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:07,634 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:07,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:07,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 08:13:07,839 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:07,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1600483982, now seen corresponding path program 6 times [2022-11-19 08:13:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:07,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215225726] [2022-11-19 08:13:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:13:08,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:08,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215225726] [2022-11-19 08:13:08,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215225726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423712962] [2022-11-19 08:13:08,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:13:08,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:08,095 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:08,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 08:13:08,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:13:08,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:08,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:13:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 08:13:08,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 08:13:08,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423712962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:08,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998009370] [2022-11-19 08:13:08,317 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:13:08,317 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:08,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:08,318 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:08,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:08,422 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:08,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13195#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:08,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:08,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:08,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-11-19 08:13:08,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988943360] [2022-11-19 08:13:08,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:08,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:13:08,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:13:08,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:13:08,570 INFO L87 Difference]: Start difference. First operand 165 states and 215 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:09,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:09,055 INFO L93 Difference]: Finished difference Result 238 states and 316 transitions. [2022-11-19 08:13:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:13:09,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2022-11-19 08:13:09,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:09,058 INFO L225 Difference]: With dead ends: 238 [2022-11-19 08:13:09,058 INFO L226 Difference]: Without dead ends: 223 [2022-11-19 08:13:09,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:13:09,059 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:09,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 25 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:13:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-19 08:13:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 215. [2022-11-19 08:13:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.2897196261682242) internal successors, (276), 214 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) [2022-11-19 08:13:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 276 transitions. [2022-11-19 08:13:09,162 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 276 transitions. Word has length 26 [2022-11-19 08:13:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:09,163 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 276 transitions. [2022-11-19 08:13:09,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 276 transitions. [2022-11-19 08:13:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:13:09,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:09,164 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:09,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:09,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 08:13:09,369 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:09,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1554131044, now seen corresponding path program 8 times [2022-11-19 08:13:09,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:09,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328481015] [2022-11-19 08:13:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:09,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:13:09,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:09,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328481015] [2022-11-19 08:13:09,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328481015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:09,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37481863] [2022-11-19 08:13:09,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:13:09,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:09,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:09,698 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:09,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 08:13:09,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:13:09,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:09,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 08:13:09,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:13:10,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:13:10,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37481863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:10,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068704194] [2022-11-19 08:13:10,593 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:13:10,593 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:10,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:10,593 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:10,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:10,694 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:11,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14291#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:11,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:11,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:11,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 12] total 34 [2022-11-19 08:13:11,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753860022] [2022-11-19 08:13:11,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:11,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 08:13:11,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:11,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 08:13:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 08:13:11,007 INFO L87 Difference]: Start difference. First operand 215 states and 276 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 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) [2022-11-19 08:13:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:25,331 INFO L93 Difference]: Finished difference Result 520 states and 717 transitions. [2022-11-19 08:13:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-19 08:13:25,332 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 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 26 [2022-11-19 08:13:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:25,334 INFO L225 Difference]: With dead ends: 520 [2022-11-19 08:13:25,334 INFO L226 Difference]: Without dead ends: 446 [2022-11-19 08:13:25,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5599 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=2110, Invalid=17630, Unknown=0, NotChecked=0, Total=19740 [2022-11-19 08:13:25,336 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 239 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 3231 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 3778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 3231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:25,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 398 Invalid, 3778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 3231 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-19 08:13:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-19 08:13:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 207. [2022-11-19 08:13:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3640776699029127) internal successors, (281), 206 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 281 transitions. [2022-11-19 08:13:25,455 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 281 transitions. Word has length 26 [2022-11-19 08:13:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:25,456 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 281 transitions. [2022-11-19 08:13:25,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 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) [2022-11-19 08:13:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 281 transitions. [2022-11-19 08:13:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:13:25,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:25,459 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:25,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:25,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:25,662 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:25,662 INFO L85 PathProgramCache]: Analyzing trace with hash -524531508, now seen corresponding path program 9 times [2022-11-19 08:13:25,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:25,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521759019] [2022-11-19 08:13:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:25,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:13:26,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:26,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521759019] [2022-11-19 08:13:26,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521759019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:26,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686637055] [2022-11-19 08:13:26,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:13:26,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:26,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:26,038 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:26,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 08:13:26,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:13:26,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:26,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:13:26,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:13:26,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:13:26,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686637055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:26,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [946714088] [2022-11-19 08:13:26,327 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:13:26,328 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:26,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:26,328 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:26,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:26,413 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:26,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16088#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:26,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:26,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:26,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2022-11-19 08:13:26,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78400871] [2022-11-19 08:13:26,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:26,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:13:26,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:26,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:13:26,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:13:26,635 INFO L87 Difference]: Start difference. First operand 207 states and 281 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) 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) [2022-11-19 08:13:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:43,597 INFO L93 Difference]: Finished difference Result 361 states and 515 transitions. [2022-11-19 08:13:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-19 08:13:43,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 27 [2022-11-19 08:13:43,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:43,598 INFO L225 Difference]: With dead ends: 361 [2022-11-19 08:13:43,598 INFO L226 Difference]: Without dead ends: 310 [2022-11-19 08:13:43,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6294 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1534, Invalid=17926, Unknown=0, NotChecked=0, Total=19460 [2022-11-19 08:13:43,600 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 214 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:43,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 99 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 08:13:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-19 08:13:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 219. [2022-11-19 08:13:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.3394495412844036) internal successors, (292), 218 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) [2022-11-19 08:13:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 292 transitions. [2022-11-19 08:13:43,724 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 292 transitions. Word has length 27 [2022-11-19 08:13:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:43,724 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 292 transitions. [2022-11-19 08:13:43,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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) [2022-11-19 08:13:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 292 transitions. [2022-11-19 08:13:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:13:43,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:43,726 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:43,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:43,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 08:13:43,928 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1311700973, now seen corresponding path program 7 times [2022-11-19 08:13:43,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:43,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037058679] [2022-11-19 08:13:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:43,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:13:44,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:44,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037058679] [2022-11-19 08:13:44,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037058679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:44,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175120587] [2022-11-19 08:13:44,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:13:44,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:44,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:44,309 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:44,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 08:13:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:44,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 08:13:44,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:13:44,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 08:13:44,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175120587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:44,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254920129] [2022-11-19 08:13:44,739 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:13:44,739 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:44,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:44,739 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:44,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:44,845 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:45,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17638#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:45,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:45,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:45,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 8] total 26 [2022-11-19 08:13:45,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841122802] [2022-11-19 08:13:45,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:45,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 08:13:45,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:45,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 08:13:45,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:13:45,068 INFO L87 Difference]: Start difference. First operand 219 states and 292 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-11-19 08:13:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:47,001 INFO L93 Difference]: Finished difference Result 552 states and 740 transitions. [2022-11-19 08:13:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 08:13:47,001 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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 27 [2022-11-19 08:13:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:47,003 INFO L225 Difference]: With dead ends: 552 [2022-11-19 08:13:47,003 INFO L226 Difference]: Without dead ends: 508 [2022-11-19 08:13:47,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=405, Invalid=1575, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 08:13:47,004 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 242 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:47,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 345 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:13:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-11-19 08:13:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 268. [2022-11-19 08:13:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.2771535580524345) internal successors, (341), 267 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 341 transitions. [2022-11-19 08:13:47,264 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 341 transitions. Word has length 27 [2022-11-19 08:13:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:47,264 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 341 transitions. [2022-11-19 08:13:47,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-11-19 08:13:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 341 transitions. [2022-11-19 08:13:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:13:47,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:47,266 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:47,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:47,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 08:13:47,481 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:47,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:47,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1326132748, now seen corresponding path program 8 times [2022-11-19 08:13:47,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:47,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690492942] [2022-11-19 08:13:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:47,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:13:47,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:47,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690492942] [2022-11-19 08:13:47,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690492942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:47,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950625528] [2022-11-19 08:13:47,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:13:47,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:47,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:47,815 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:47,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 08:13:47,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:13:47,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:47,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:13:47,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 08:13:48,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 08:13:48,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950625528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:48,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [565652331] [2022-11-19 08:13:48,096 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:13:48,096 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:48,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:48,097 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:48,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:48,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:48,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19429#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:48,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:48,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:48,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 10 [2022-11-19 08:13:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088600759] [2022-11-19 08:13:48,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:13:48,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:13:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:13:48,362 INFO L87 Difference]: Start difference. First operand 268 states and 341 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2022-11-19 08:13:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:48,714 INFO L93 Difference]: Finished difference Result 328 states and 421 transitions. [2022-11-19 08:13:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:13:48,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) Word has length 29 [2022-11-19 08:13:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:48,715 INFO L225 Difference]: With dead ends: 328 [2022-11-19 08:13:48,715 INFO L226 Difference]: Without dead ends: 300 [2022-11-19 08:13:48,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:13:48,716 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:48,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:13:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-19 08:13:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 256. [2022-11-19 08:13:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.2823529411764707) internal successors, (327), 255 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 327 transitions. [2022-11-19 08:13:48,854 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 327 transitions. Word has length 29 [2022-11-19 08:13:48,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:48,854 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 327 transitions. [2022-11-19 08:13:48,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2022-11-19 08:13:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 327 transitions. [2022-11-19 08:13:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:13:48,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:48,855 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:48,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:49,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:49,061 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:49,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2135271873, now seen corresponding path program 8 times [2022-11-19 08:13:49,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:49,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997326056] [2022-11-19 08:13:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:49,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 08:13:49,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:49,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997326056] [2022-11-19 08:13:49,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997326056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:49,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066184898] [2022-11-19 08:13:49,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:13:49,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:49,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:49,395 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:49,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 08:13:49,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:13:49,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:49,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:13:49,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-19 08:13:49,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-19 08:13:50,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066184898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:50,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857205062] [2022-11-19 08:13:50,061 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:13:50,062 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:50,062 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:50,062 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:50,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:50,161 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:50,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20790#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:50,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:50,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:50,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2022-11-19 08:13:50,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60012313] [2022-11-19 08:13:50,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:50,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 08:13:50,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:50,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 08:13:50,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 08:13:50,436 INFO L87 Difference]: Start difference. First operand 256 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:12,962 INFO L93 Difference]: Finished difference Result 720 states and 964 transitions. [2022-11-19 08:14:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-11-19 08:14:12,963 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 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 29 [2022-11-19 08:14:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:12,965 INFO L225 Difference]: With dead ends: 720 [2022-11-19 08:14:12,965 INFO L226 Difference]: Without dead ends: 629 [2022-11-19 08:14:12,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9811 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=2850, Invalid=26562, Unknown=0, NotChecked=0, Total=29412 [2022-11-19 08:14:12,968 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 458 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:12,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 292 Invalid, 2259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-19 08:14:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-19 08:14:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 277. [2022-11-19 08:14:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.3405797101449275) internal successors, (370), 276 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 370 transitions. [2022-11-19 08:14:13,131 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 370 transitions. Word has length 29 [2022-11-19 08:14:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:13,131 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 370 transitions. [2022-11-19 08:14:13,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 370 transitions. [2022-11-19 08:14:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:14:13,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:13,133 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:13,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:13,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-19 08:14:13,333 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:13,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:13,334 INFO L85 PathProgramCache]: Analyzing trace with hash 473554829, now seen corresponding path program 10 times [2022-11-19 08:14:13,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:13,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555507371] [2022-11-19 08:14:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:13,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:14:13,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555507371] [2022-11-19 08:14:13,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555507371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324811285] [2022-11-19 08:14:13,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:14:13,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:13,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:13,667 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:13,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-19 08:14:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:13,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-19 08:14:13,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:14:13,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 08:14:14,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324811285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:14,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952312049] [2022-11-19 08:14:14,180 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:14:14,180 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:14:14,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:14:14,181 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:14:14,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:14:14,271 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:14:14,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23235#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:14:14,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:14:14,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:14,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 10] total 30 [2022-11-19 08:14:14,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118690943] [2022-11-19 08:14:14,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 08:14:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:14,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 08:14:14,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:14:14,488 INFO L87 Difference]: Start difference. First operand 277 states and 370 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 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) [2022-11-19 08:14:19,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:19,485 INFO L93 Difference]: Finished difference Result 493 states and 655 transitions. [2022-11-19 08:14:19,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-19 08:14:19,485 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 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) Word has length 29 [2022-11-19 08:14:19,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:19,487 INFO L225 Difference]: With dead ends: 493 [2022-11-19 08:14:19,487 INFO L226 Difference]: Without dead ends: 378 [2022-11-19 08:14:19,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=594, Invalid=6716, Unknown=0, NotChecked=0, Total=7310 [2022-11-19 08:14:19,489 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 161 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:19,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 370 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:14:19,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-19 08:14:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 241. [2022-11-19 08:14:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.4) internal successors, (336), 240 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 336 transitions. [2022-11-19 08:14:19,627 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 336 transitions. Word has length 29 [2022-11-19 08:14:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:19,627 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 336 transitions. [2022-11-19 08:14:19,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 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) [2022-11-19 08:14:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 336 transitions. [2022-11-19 08:14:19,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:14:19,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:19,628 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:19,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:19,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-19 08:14:19,828 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:19,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1114080068, now seen corresponding path program 11 times [2022-11-19 08:14:19,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:19,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398652707] [2022-11-19 08:14:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:19,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:20,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:20,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398652707] [2022-11-19 08:14:20,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398652707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:20,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511476273] [2022-11-19 08:14:20,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:14:20,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:20,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:20,244 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:20,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 08:14:20,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 08:14:20,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:14:20,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:14:20,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 08:14:20,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 08:14:20,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511476273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:20,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1923439727] [2022-11-19 08:14:20,766 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:14:20,766 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:14:20,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:14:20,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:14:20,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:14:20,861 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:14:21,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24952#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:14:21,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:14:21,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:21,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2022-11-19 08:14:21,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314469317] [2022-11-19 08:14:21,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:21,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 08:14:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 08:14:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-11-19 08:14:21,110 INFO L87 Difference]: Start difference. First operand 241 states and 336 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-11-19 08:14:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:45,035 INFO L93 Difference]: Finished difference Result 409 states and 595 transitions. [2022-11-19 08:14:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-19 08:14:45,035 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) Word has length 30 [2022-11-19 08:14:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:45,036 INFO L225 Difference]: With dead ends: 409 [2022-11-19 08:14:45,036 INFO L226 Difference]: Without dead ends: 351 [2022-11-19 08:14:45,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3680 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=1330, Invalid=12242, Unknown=0, NotChecked=0, Total=13572 [2022-11-19 08:14:45,038 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 109 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:45,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 84 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-19 08:14:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-19 08:14:45,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 291. [2022-11-19 08:14:45,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.3310344827586207) internal successors, (386), 290 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 386 transitions. [2022-11-19 08:14:45,236 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 386 transitions. Word has length 30 [2022-11-19 08:14:45,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:45,236 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 386 transitions. [2022-11-19 08:14:45,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-11-19 08:14:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 386 transitions. [2022-11-19 08:14:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:14:45,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:45,237 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:45,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:45,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-19 08:14:45,441 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:45,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2077061618, now seen corresponding path program 12 times [2022-11-19 08:14:45,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:45,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480716592] [2022-11-19 08:14:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:45,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:14:45,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:45,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480716592] [2022-11-19 08:14:45,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480716592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:45,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344536996] [2022-11-19 08:14:45,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:14:45,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:45,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:45,883 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:45,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-19 08:14:45,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:14:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:14:45,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-19 08:14:45,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:46,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 08:14:47,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344536996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:47,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97158544] [2022-11-19 08:14:47,056 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:14:47,056 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:14:47,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:14:47,056 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:14:47,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:14:47,157 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:14:47,435 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26745#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:14:47,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:14:47,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:47,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 15] total 45 [2022-11-19 08:14:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157169114] [2022-11-19 08:14:47,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:47,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 08:14:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:47,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 08:14:47,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 08:14:47,437 INFO L87 Difference]: Start difference. First operand 291 states and 386 transitions. Second operand has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 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) [2022-11-19 08:15:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:05,307 INFO L93 Difference]: Finished difference Result 705 states and 976 transitions. [2022-11-19 08:15:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-19 08:15:05,308 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 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 32 [2022-11-19 08:15:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:05,314 INFO L225 Difference]: With dead ends: 705 [2022-11-19 08:15:05,315 INFO L226 Difference]: Without dead ends: 653 [2022-11-19 08:15:05,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7315 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=2554, Invalid=20398, Unknown=0, NotChecked=0, Total=22952 [2022-11-19 08:15:05,322 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 208 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 4239 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 4737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 4239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:05,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 485 Invalid, 4737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 4239 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-19 08:15:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-11-19 08:15:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 296. [2022-11-19 08:15:05,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.4) internal successors, (413), 295 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 413 transitions. [2022-11-19 08:15:05,556 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 413 transitions. Word has length 32 [2022-11-19 08:15:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:05,556 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 413 transitions. [2022-11-19 08:15:05,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 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) [2022-11-19 08:15:05,557 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 413 transitions. [2022-11-19 08:15:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:15:05,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:05,557 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:05,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:05,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:05,758 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash 824157404, now seen corresponding path program 13 times [2022-11-19 08:15:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:05,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284390082] [2022-11-19 08:15:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 08:15:06,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:06,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284390082] [2022-11-19 08:15:06,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284390082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:06,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904598704] [2022-11-19 08:15:06,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:15:06,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:06,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:06,179 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:06,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-19 08:15:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:06,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-19 08:15:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 08:15:06,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 08:15:06,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904598704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:06,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1663272883] [2022-11-19 08:15:06,618 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:15:06,618 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:15:06,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:15:06,619 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:15:06,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:15:06,740 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:15:06,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29124#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:15:06,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:15:06,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:15:06,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2022-11-19 08:15:06,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805045439] [2022-11-19 08:15:06,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:06,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 08:15:06,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:06,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 08:15:06,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-11-19 08:15:06,996 INFO L87 Difference]: Start difference. First operand 296 states and 413 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 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) [2022-11-19 08:15:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:18,042 INFO L93 Difference]: Finished difference Result 476 states and 634 transitions. [2022-11-19 08:15:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-19 08:15:18,043 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 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 33 [2022-11-19 08:15:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:18,045 INFO L225 Difference]: With dead ends: 476 [2022-11-19 08:15:18,045 INFO L226 Difference]: Without dead ends: 411 [2022-11-19 08:15:18,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=785, Invalid=7225, Unknown=0, NotChecked=0, Total=8010 [2022-11-19 08:15:18,046 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:18,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 255 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-19 08:15:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-11-19 08:15:18,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 299. [2022-11-19 08:15:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.3859060402684564) internal successors, (413), 298 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:18,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 413 transitions. [2022-11-19 08:15:18,299 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 413 transitions. Word has length 33 [2022-11-19 08:15:18,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:18,299 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 413 transitions. [2022-11-19 08:15:18,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 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) [2022-11-19 08:15:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 413 transitions. [2022-11-19 08:15:18,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:15:18,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:18,300 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:18,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:18,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:18,501 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash -121570228, now seen corresponding path program 14 times [2022-11-19 08:15:18,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:18,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855301497] [2022-11-19 08:15:18,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:18,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:15:19,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:19,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855301497] [2022-11-19 08:15:19,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855301497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:19,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19225562] [2022-11-19 08:15:19,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:15:19,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:19,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:19,007 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:19,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-19 08:15:19,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 08:15:19,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-19 08:15:19,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:15:19,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:15:19,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19225562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:19,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654913821] [2022-11-19 08:15:19,619 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:15:19,619 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:15:19,620 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:15:19,620 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:15:19,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:15:19,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:15:19,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30991#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:15:19,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:15:19,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:15:19,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 11] total 30 [2022-11-19 08:15:19,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615582450] [2022-11-19 08:15:19,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:19,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 08:15:19,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:19,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 08:15:19,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:15:19,966 INFO L87 Difference]: Start difference. First operand 299 states and 413 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2022-11-19 08:15:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:29,002 INFO L93 Difference]: Finished difference Result 774 states and 1131 transitions. [2022-11-19 08:15:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-19 08:15:29,002 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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 33 [2022-11-19 08:15:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:29,004 INFO L225 Difference]: With dead ends: 774 [2022-11-19 08:15:29,004 INFO L226 Difference]: Without dead ends: 709 [2022-11-19 08:15:29,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3245 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2333, Invalid=11709, Unknown=0, NotChecked=0, Total=14042 [2022-11-19 08:15:29,006 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 206 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:29,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 129 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-19 08:15:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-11-19 08:15:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 337. [2022-11-19 08:15:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.4166666666666667) internal successors, (476), 336 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 476 transitions. [2022-11-19 08:15:29,454 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 476 transitions. Word has length 33 [2022-11-19 08:15:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:29,455 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 476 transitions. [2022-11-19 08:15:29,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2022-11-19 08:15:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 476 transitions. [2022-11-19 08:15:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:15:29,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:29,456 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:29,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:29,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-19 08:15:29,663 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1686717663, now seen corresponding path program 9 times [2022-11-19 08:15:29,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:29,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311105366] [2022-11-19 08:15:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:15:30,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:30,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311105366] [2022-11-19 08:15:30,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311105366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:30,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595790415] [2022-11-19 08:15:30,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:15:30,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:30,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:30,172 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:30,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 08:15:30,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:15:30,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:30,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-19 08:15:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:15:30,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-19 08:15:30,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595790415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:30,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85040628] [2022-11-19 08:15:30,796 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:15:30,796 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:15:30,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:15:30,797 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:15:30,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:15:30,901 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:15:31,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33596#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:15:31,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:15:31,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:15:31,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 10] total 33 [2022-11-19 08:15:31,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136007905] [2022-11-19 08:15:31,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:31,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 08:15:31,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:31,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 08:15:31,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:15:31,161 INFO L87 Difference]: Start difference. First operand 337 states and 476 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 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) [2022-11-19 08:15:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:35,292 INFO L93 Difference]: Finished difference Result 865 states and 1170 transitions. [2022-11-19 08:15:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-19 08:15:35,292 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 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 33 [2022-11-19 08:15:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:35,295 INFO L225 Difference]: With dead ends: 865 [2022-11-19 08:15:35,295 INFO L226 Difference]: Without dead ends: 811 [2022-11-19 08:15:35,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=821, Invalid=2961, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 08:15:35,296 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 358 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:35,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 577 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 2170 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:15:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-19 08:15:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 423. [2022-11-19 08:15:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.3436018957345972) internal successors, (567), 422 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 567 transitions. [2022-11-19 08:15:35,839 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 567 transitions. Word has length 33 [2022-11-19 08:15:35,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:35,840 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 567 transitions. [2022-11-19 08:15:35,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 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) [2022-11-19 08:15:35,840 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 567 transitions. [2022-11-19 08:15:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 08:15:35,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:35,841 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:35,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:36,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-19 08:15:36,041 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2110658808, now seen corresponding path program 15 times [2022-11-19 08:15:36,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:36,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137434503] [2022-11-19 08:15:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:36,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:15:36,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137434503] [2022-11-19 08:15:36,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137434503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952782142] [2022-11-19 08:15:36,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:15:36,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:36,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:36,484 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:36,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-19 08:15:36,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:15:36,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:36,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-19 08:15:36,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:15:36,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:15:37,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952782142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [159265197] [2022-11-19 08:15:37,842 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:15:37,842 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:15:37,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:15:37,843 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:15:37,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:15:37,958 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:15:38,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36399#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:15:38,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:15:38,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:15:38,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 50 [2022-11-19 08:15:38,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866511194] [2022-11-19 08:15:38,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:38,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-19 08:15:38,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:38,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-19 08:15:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2640, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 08:15:38,279 INFO L87 Difference]: Start difference. First operand 423 states and 567 transitions. Second operand has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 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) [2022-11-19 08:16:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:36,541 INFO L93 Difference]: Finished difference Result 820 states and 1039 transitions. [2022-11-19 08:16:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-11-19 08:16:36,542 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 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 35 [2022-11-19 08:16:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:36,544 INFO L225 Difference]: With dead ends: 820 [2022-11-19 08:16:36,544 INFO L226 Difference]: Without dead ends: 686 [2022-11-19 08:16:36,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4498 ImplicationChecksByTransitivity, 54.4s TimeCoverageRelationStatistics Valid=1190, Invalid=16366, Unknown=0, NotChecked=0, Total=17556 [2022-11-19 08:16:36,545 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 289 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 3048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:36,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 468 Invalid, 3048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-19 08:16:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-11-19 08:16:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 456. [2022-11-19 08:16:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.3208791208791208) internal successors, (601), 455 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 601 transitions. [2022-11-19 08:16:37,012 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 601 transitions. Word has length 35 [2022-11-19 08:16:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:37,013 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 601 transitions. [2022-11-19 08:16:37,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 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) [2022-11-19 08:16:37,013 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 601 transitions. [2022-11-19 08:16:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 08:16:37,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:37,015 INFO L195 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:37,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:37,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:37,222 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:16:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1776513891, now seen corresponding path program 10 times [2022-11-19 08:16:37,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:16:37,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951470053] [2022-11-19 08:16:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:37,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:16:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:16:37,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:16:37,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951470053] [2022-11-19 08:16:37,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951470053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:16:37,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500989252] [2022-11-19 08:16:37,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:16:37,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:37,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:16:37,692 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:16:37,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-19 08:16:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:37,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-19 08:16:37,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:16:38,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-19 08:16:39,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500989252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:16:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599196870] [2022-11-19 08:16:39,091 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:16:39,091 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:16:39,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:16:39,092 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:16:39,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:16:39,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:16:39,554 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39299#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:16:39,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:16:39,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:16:39,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 16] total 49 [2022-11-19 08:16:39,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810151621] [2022-11-19 08:16:39,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:16:39,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 08:16:39,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:16:39,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 08:16:39,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=2451, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 08:16:39,556 INFO L87 Difference]: Start difference. First operand 456 states and 601 transitions. Second operand has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 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) [2022-11-19 08:17:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:07,270 INFO L93 Difference]: Finished difference Result 1066 states and 1428 transitions. [2022-11-19 08:17:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-11-19 08:17:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 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) Word has length 35 [2022-11-19 08:17:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:07,272 INFO L225 Difference]: With dead ends: 1066 [2022-11-19 08:17:07,272 INFO L226 Difference]: Without dead ends: 924 [2022-11-19 08:17:07,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11928 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=3382, Invalid=31774, Unknown=0, NotChecked=0, Total=35156 [2022-11-19 08:17:07,274 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 239 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 5457 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 6112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 5457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:07,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 617 Invalid, 6112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 5457 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-19 08:17:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-19 08:17:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 465. [2022-11-19 08:17:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.3599137931034482) internal successors, (631), 464 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:17:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 631 transitions. [2022-11-19 08:17:07,827 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 631 transitions. Word has length 35 [2022-11-19 08:17:07,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:07,828 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 631 transitions. [2022-11-19 08:17:07,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 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) [2022-11-19 08:17:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 631 transitions. [2022-11-19 08:17:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:17:07,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:17:07,830 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:07,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-19 08:17:08,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-19 08:17:08,036 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:17:08,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:17:08,036 INFO L85 PathProgramCache]: Analyzing trace with hash 397093308, now seen corresponding path program 16 times [2022-11-19 08:17:08,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:17:08,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35823861] [2022-11-19 08:17:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:17:08,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:17:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:17:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:17:08,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:17:08,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35823861] [2022-11-19 08:17:08,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35823861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:17:08,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074515263] [2022-11-19 08:17:08,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:17:08,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:08,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:17:08,694 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:17:08,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 08:17:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:17:08,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-19 08:17:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:17:09,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:17:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:17:09,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074515263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:17:09,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134962489] [2022-11-19 08:17:09,284 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:17:09,284 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:17:09,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:17:09,284 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:17:09,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:17:09,386 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:17:09,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42817#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:17:09,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:17:09,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:17:09,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 33 [2022-11-19 08:17:09,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783499152] [2022-11-19 08:17:09,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:17:09,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 08:17:09,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:17:09,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 08:17:09,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:17:09,681 INFO L87 Difference]: Start difference. First operand 465 states and 631 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 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) [2022-11-19 08:19:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:54,789 INFO L93 Difference]: Finished difference Result 774 states and 1119 transitions. [2022-11-19 08:19:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-19 08:19:54,790 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 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 36 [2022-11-19 08:19:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:54,791 INFO L225 Difference]: With dead ends: 774 [2022-11-19 08:19:54,791 INFO L226 Difference]: Without dead ends: 700 [2022-11-19 08:19:54,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17710 ImplicationChecksByTransitivity, 153.7s TimeCoverageRelationStatistics Valid=3438, Invalid=46961, Unknown=1, NotChecked=0, Total=50400 [2022-11-19 08:19:54,794 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 411 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4746 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 5116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 4746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:54,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 188 Invalid, 5116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 4746 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2022-11-19 08:19:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-19 08:19:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 511. [2022-11-19 08:19:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.3490196078431373) internal successors, (688), 510 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:19:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 688 transitions. [2022-11-19 08:19:55,371 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 688 transitions. Word has length 36 [2022-11-19 08:19:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:55,371 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 688 transitions. [2022-11-19 08:19:55,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 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) [2022-11-19 08:19:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 688 transitions. [2022-11-19 08:19:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:19:55,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:55,373 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:55,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:55,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-19 08:19:55,578 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:55,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:55,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1634681185, now seen corresponding path program 11 times [2022-11-19 08:19:55,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:55,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597801348] [2022-11-19 08:19:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:55,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:19:56,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:56,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597801348] [2022-11-19 08:19:56,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597801348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:19:56,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256601422] [2022-11-19 08:19:56,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:19:56,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:56,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:56,060 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:56,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-19 08:19:56,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:19:56,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:19:56,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:19:56,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-19 08:19:56,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:19:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-19 08:19:56,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256601422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:56,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [833088264] [2022-11-19 08:19:56,414 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:19:56,414 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:19:56,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:19:56,414 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:19:56,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:19:56,516 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:19:56,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45992#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:19:56,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:19:56,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:19:56,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8, 8] total 29 [2022-11-19 08:19:56,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758787057] [2022-11-19 08:19:56,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:19:56,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 08:19:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:56,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 08:19:56,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:19:56,762 INFO L87 Difference]: Start difference. First operand 511 states and 688 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 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) [2022-11-19 08:20:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:20:18,551 INFO L93 Difference]: Finished difference Result 1365 states and 1821 transitions. [2022-11-19 08:20:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-11-19 08:20:18,552 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 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) Word has length 37 [2022-11-19 08:20:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:20:18,554 INFO L225 Difference]: With dead ends: 1365 [2022-11-19 08:20:18,554 INFO L226 Difference]: Without dead ends: 1192 [2022-11-19 08:20:18,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13283 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=2240, Invalid=35590, Unknown=0, NotChecked=0, Total=37830 [2022-11-19 08:20:18,556 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 177 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 4794 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 5096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 4794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:20:18,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 553 Invalid, 5096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 4794 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-19 08:20:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-11-19 08:20:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 591. [2022-11-19 08:20:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.3152542372881355) internal successors, (776), 590 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:20:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 776 transitions. [2022-11-19 08:20:19,319 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 776 transitions. Word has length 37 [2022-11-19 08:20:19,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:20:19,320 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 776 transitions. [2022-11-19 08:20:19,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 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) [2022-11-19 08:20:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 776 transitions. [2022-11-19 08:20:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:20:19,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:20:19,322 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:19,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-19 08:20:19,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:20:19,527 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:20:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:20:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1092529570, now seen corresponding path program 17 times [2022-11-19 08:20:19,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:20:19,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263778923] [2022-11-19 08:20:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:20:19,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:20:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:20:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:20:19,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:20:19,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263778923] [2022-11-19 08:20:19,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263778923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:20:19,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264759766] [2022-11-19 08:20:19,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:20:19,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:20:19,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:20:19,909 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:20:19,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 08:20:20,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 08:20:20,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:20:20,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:20:20,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:20:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 08:20:20,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:20:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 08:20:20,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264759766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:20:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1356183916] [2022-11-19 08:20:20,733 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:20:20,733 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:20:20,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:20:20,733 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:20:20,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:20:20,831 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:20:21,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50431#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:20:21,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:20:21,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:20:21,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 37 [2022-11-19 08:20:21,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700457262] [2022-11-19 08:20:21,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:20:21,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-19 08:20:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:20:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-19 08:20:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 08:20:21,090 INFO L87 Difference]: Start difference. First operand 591 states and 776 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 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) [2022-11-19 08:21:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:11,895 INFO L93 Difference]: Finished difference Result 1186 states and 1546 transitions. [2022-11-19 08:21:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-11-19 08:21:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 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 38 [2022-11-19 08:21:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:11,899 INFO L225 Difference]: With dead ends: 1186 [2022-11-19 08:21:11,899 INFO L226 Difference]: Without dead ends: 1086 [2022-11-19 08:21:11,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19119 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=4474, Invalid=48196, Unknown=0, NotChecked=0, Total=52670 [2022-11-19 08:21:11,903 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 474 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:11,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 356 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-19 08:21:11,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-11-19 08:21:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 642. [2022-11-19 08:21:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.3354134165366616) internal successors, (856), 641 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:21:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 856 transitions. [2022-11-19 08:21:12,611 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 856 transitions. Word has length 38 [2022-11-19 08:21:12,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:12,611 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 856 transitions. [2022-11-19 08:21:12,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 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) [2022-11-19 08:21:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 856 transitions. [2022-11-19 08:21:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:21:12,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:12,613 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:12,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-19 08:21:12,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-19 08:21:12,818 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:12,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1064896814, now seen corresponding path program 12 times [2022-11-19 08:21:12,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:12,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914627935] [2022-11-19 08:21:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 08:21:13,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:13,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914627935] [2022-11-19 08:21:13,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914627935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:21:13,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827983728] [2022-11-19 08:21:13,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:21:13,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:13,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:13,337 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:13,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-19 08:21:13,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:21:13,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:21:13,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-19 08:21:13,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:21:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:21:14,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:21:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-19 08:21:14,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827983728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:21:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603992933] [2022-11-19 08:21:14,819 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:21:14,819 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:21:14,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:21:14,819 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:21:14,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:21:14,910 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:21:15,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54711#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:21:15,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:21:15,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:21:15,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 16] total 51 [2022-11-19 08:21:15,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371227709] [2022-11-19 08:21:15,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:21:15,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 08:21:15,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:15,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 08:21:15,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2659, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 08:21:15,228 INFO L87 Difference]: Start difference. First operand 642 states and 856 transitions. Second operand has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:21:40,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:40,353 INFO L93 Difference]: Finished difference Result 1460 states and 1945 transitions. [2022-11-19 08:21:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-11-19 08:21:40,353 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 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) Word has length 38 [2022-11-19 08:21:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:40,356 INFO L225 Difference]: With dead ends: 1460 [2022-11-19 08:21:40,356 INFO L226 Difference]: Without dead ends: 1243 [2022-11-19 08:21:40,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12569 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=3290, Invalid=34152, Unknown=0, NotChecked=0, Total=37442 [2022-11-19 08:21:40,359 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 204 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 5424 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 6090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 5424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:40,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 665 Invalid, 6090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 5424 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-19 08:21:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-11-19 08:21:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 659. [2022-11-19 08:21:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.3693009118541033) internal successors, (901), 658 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:21:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 901 transitions. [2022-11-19 08:21:41,157 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 901 transitions. Word has length 38 [2022-11-19 08:21:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:41,157 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 901 transitions. [2022-11-19 08:21:41,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:21:41,157 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 901 transitions. [2022-11-19 08:21:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 08:21:41,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:41,159 INFO L195 NwaCegarLoop]: trace histogram [17, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:41,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-19 08:21:41,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:41,365 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:41,365 INFO L85 PathProgramCache]: Analyzing trace with hash -307222280, now seen corresponding path program 13 times [2022-11-19 08:21:41,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:41,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139272983] [2022-11-19 08:21:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:41,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:21:41,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:41,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139272983] [2022-11-19 08:21:41,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139272983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:21:41,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516176581] [2022-11-19 08:21:41,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:21:41,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:41,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:41,897 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:41,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-19 08:21:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:41,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-19 08:21:41,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:21:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:21:42,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:21:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-19 08:21:42,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516176581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:21:42,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1552622663] [2022-11-19 08:21:42,646 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:21:42,646 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:21:42,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:21:42,646 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:21:42,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:21:42,729 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:21:42,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59444#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:21:42,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:21:42,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:21:42,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 12] total 40 [2022-11-19 08:21:42,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478295] [2022-11-19 08:21:42,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:21:42,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-19 08:21:42,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-19 08:21:42,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1795, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 08:21:42,998 INFO L87 Difference]: Start difference. First operand 659 states and 901 transitions. Second operand has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 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) [2022-11-19 08:22:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:02,056 INFO L93 Difference]: Finished difference Result 1417 states and 1873 transitions. [2022-11-19 08:22:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-11-19 08:22:02,057 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 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 40 [2022-11-19 08:22:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:02,059 INFO L225 Difference]: With dead ends: 1417 [2022-11-19 08:22:02,059 INFO L226 Difference]: Without dead ends: 1125 [2022-11-19 08:22:02,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7164 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=1243, Invalid=22937, Unknown=0, NotChecked=0, Total=24180 [2022-11-19 08:22:02,061 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 259 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 4090 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 4401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 4090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:02,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 918 Invalid, 4401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 4090 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-19 08:22:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-11-19 08:22:02,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 728. [2022-11-19 08:22:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 1.3356258596973865) internal successors, (971), 727 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:22:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 971 transitions. [2022-11-19 08:22:02,954 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 971 transitions. Word has length 40 [2022-11-19 08:22:02,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:02,955 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 971 transitions. [2022-11-19 08:22:02,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 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) [2022-11-19 08:22:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 971 transitions. [2022-11-19 08:22:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 08:22:02,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:02,956 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:02,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-19 08:22:03,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-19 08:22:03,158 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:03,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:03,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1084705188, now seen corresponding path program 18 times [2022-11-19 08:22:03,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:03,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995328817] [2022-11-19 08:22:03,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:03,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 08:22:03,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:03,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995328817] [2022-11-19 08:22:03,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995328817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:22:03,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928268931] [2022-11-19 08:22:03,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:22:03,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:03,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:03,613 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:03,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-19 08:22:03,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:22:03,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:22:03,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 08:22:03,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-19 08:22:04,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:22:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-19 08:22:04,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928268931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:22:04,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035010579] [2022-11-19 08:22:04,145 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:22:04,145 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:22:04,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:22:04,145 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:22:04,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:22:04,235 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:22:04,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64157#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:22:04,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:22:04,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:22:04,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 33 [2022-11-19 08:22:04,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134607074] [2022-11-19 08:22:04,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:22:04,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 08:22:04,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:04,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 08:22:04,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:22:04,516 INFO L87 Difference]: Start difference. First operand 728 states and 971 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 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) [2022-11-19 08:22:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:42,262 INFO L93 Difference]: Finished difference Result 1007 states and 1310 transitions. [2022-11-19 08:22:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-19 08:22:42,263 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 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 41 [2022-11-19 08:22:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:42,265 INFO L225 Difference]: With dead ends: 1007 [2022-11-19 08:22:42,265 INFO L226 Difference]: Without dead ends: 941 [2022-11-19 08:22:42,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4901 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=1435, Invalid=16387, Unknown=0, NotChecked=0, Total=17822 [2022-11-19 08:22:42,267 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 230 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 2477 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 2477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:42,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 440 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 2477 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-19 08:22:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-11-19 08:22:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 780. [2022-11-19 08:22:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 1.3170731707317074) internal successors, (1026), 779 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:22:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1026 transitions. [2022-11-19 08:22:43,321 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1026 transitions. Word has length 41 [2022-11-19 08:22:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:43,321 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1026 transitions. [2022-11-19 08:22:43,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 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) [2022-11-19 08:22:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1026 transitions. [2022-11-19 08:22:43,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 08:22:43,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:43,323 INFO L195 NwaCegarLoop]: trace histogram [18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:43,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-19 08:22:43,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:43,530 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:43,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1965691523, now seen corresponding path program 14 times [2022-11-19 08:22:43,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:43,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776108518] [2022-11-19 08:22:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:43,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:22:44,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:44,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776108518] [2022-11-19 08:22:44,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776108518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:22:44,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906935417] [2022-11-19 08:22:44,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:22:44,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:44,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:44,180 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:44,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-19 08:22:44,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:22:44,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:22:44,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-19 08:22:44,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-11-19 08:22:44,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:22:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-19 08:22:45,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906935417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:22:45,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44647010] [2022-11-19 08:22:45,709 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:22:45,709 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:22:45,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:22:45,710 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:22:45,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:22:45,810 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:22:46,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68189#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:22:46,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:22:46,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:22:46,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 17] total 51 [2022-11-19 08:22:46,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093274334] [2022-11-19 08:22:46,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:22:46,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 08:22:46,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:46,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 08:22:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2841, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 08:22:46,181 INFO L87 Difference]: Start difference. First operand 780 states and 1026 transitions. Second operand has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 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) [2022-11-19 08:23:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:38,069 INFO L93 Difference]: Finished difference Result 1665 states and 2185 transitions. [2022-11-19 08:23:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-11-19 08:23:38,070 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 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 41 [2022-11-19 08:23:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:38,073 INFO L225 Difference]: With dead ends: 1665 [2022-11-19 08:23:38,073 INFO L226 Difference]: Without dead ends: 1350 [2022-11-19 08:23:38,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23079 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=5202, Invalid=65820, Unknown=0, NotChecked=0, Total=71022 [2022-11-19 08:23:38,076 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 370 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 8054 mSolverCounterSat, 1436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 9490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1436 IncrementalHoareTripleChecker+Valid, 8054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:38,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1048 Invalid, 9490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1436 Valid, 8054 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-19 08:23:38,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-11-19 08:23:39,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 705. [2022-11-19 08:23:39,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 1.3607954545454546) internal successors, (958), 704 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:39,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 958 transitions. [2022-11-19 08:23:39,230 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 958 transitions. Word has length 41 [2022-11-19 08:23:39,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:39,231 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 958 transitions. [2022-11-19 08:23:39,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 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) [2022-11-19 08:23:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 958 transitions. [2022-11-19 08:23:39,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 08:23:39,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:39,233 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:39,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-19 08:23:39,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:39,440 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1073319438, now seen corresponding path program 19 times [2022-11-19 08:23:39,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:39,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254047880] [2022-11-19 08:23:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:39,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:23:40,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:40,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254047880] [2022-11-19 08:23:40,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254047880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:40,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225901408] [2022-11-19 08:23:40,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:23:40,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:40,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:40,232 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:40,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af7bed4-6f4d-488e-b5cd-67a2bfd921ad/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-19 08:23:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:40,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 08:23:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 08:23:40,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:23:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 08:23:40,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225901408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:23:40,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [524551515] [2022-11-19 08:23:40,958 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:23:40,958 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:23:40,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:23:40,959 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:23:40,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:23:41,076 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:23:41,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73571#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:23:41,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:23:41,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:23:41,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2022-11-19 08:23:41,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266325190] [2022-11-19 08:23:41,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:23:41,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 08:23:41,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:41,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 08:23:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 08:23:41,411 INFO L87 Difference]: Start difference. First operand 705 states and 958 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 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)