./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur --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 d7b32f819b918e072cd2f6b8ef11cf08c33c51198307cb8de75af009db97bd7b --- 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-38b53e6 [2022-11-25 23:15:46,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:15:46,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:15:46,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:15:46,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:15:46,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:15:46,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:15:46,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:15:46,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:15:46,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:15:46,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:15:46,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:15:46,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:15:46,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:15:46,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:15:46,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:15:46,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:15:46,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:15:46,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:15:46,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:15:46,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:15:46,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:15:46,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:15:46,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:15:46,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:15:46,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:15:46,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:15:46,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:15:46,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:15:46,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:15:46,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:15:46,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:15:46,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:15:46,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:15:46,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:15:46,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:15:46,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:15:46,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:15:46,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:15:46,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:15:46,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:15:46,577 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:15:46,601 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:15:46,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:15:46,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:15:46,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:15:46,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:15:46,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:15:46,603 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:15:46,603 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:15:46,604 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:15:46,604 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:15:46,604 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:15:46,604 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:15:46,604 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:15:46,605 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:15:46,605 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:15:46,605 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:15:46,605 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:15:46,606 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:15:46,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:15:46,606 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:15:46,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:15:46,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:15:46,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:15:46,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:15:46,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:15:46,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:15:46,608 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:15:46,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:15:46,608 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:15:46,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:15:46,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:15:46,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:15:46,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:15:46,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:15:46,610 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:15:46,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:15:46,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:15:46,610 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:15:46,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:15:46,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:15:46,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:15:46,613 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_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b32f819b918e072cd2f6b8ef11cf08c33c51198307cb8de75af009db97bd7b [2022-11-25 23:15:46,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:15:46,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:15:46,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:15:46,939 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:15:46,940 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:15:46,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i [2022-11-25 23:15:50,107 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:15:50,346 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:15:50,346 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i [2022-11-25 23:15:50,353 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/data/a8ef8df63/fe6bbff60e834c77b0de1f372e108f76/FLAG3a3304cef [2022-11-25 23:15:50,369 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/data/a8ef8df63/fe6bbff60e834c77b0de1f372e108f76 [2022-11-25 23:15:50,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:15:50,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:15:50,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:15:50,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:15:50,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:15:50,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63896838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50, skipping insertion in model container [2022-11-25 23:15:50,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:15:50,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:15:50,560 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2022-11-25 23:15:50,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:15:50,586 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:15:50,599 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2022-11-25 23:15:50,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:15:50,620 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:15:50,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50 WrapperNode [2022-11-25 23:15:50,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:15:50,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:15:50,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:15:50,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:15:50,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,659 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-11-25 23:15:50,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:15:50,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:15:50,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:15:50,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:15:50,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,680 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:15:50,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:15:50,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:15:50,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:15:50,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (1/1) ... [2022-11-25 23:15:50,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:15:50,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:50,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:15:50,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:15:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:15:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:15:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:15:50,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:15:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 23:15:50,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 23:15:50,858 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:15:50,860 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:15:51,014 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:15:51,053 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:15:51,054 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 23:15:51,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:51 BoogieIcfgContainer [2022-11-25 23:15:51,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:15:51,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:15:51,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:15:51,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:15:51,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:15:50" (1/3) ... [2022-11-25 23:15:51,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c341f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:15:51, skipping insertion in model container [2022-11-25 23:15:51,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:50" (2/3) ... [2022-11-25 23:15:51,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c341f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:15:51, skipping insertion in model container [2022-11-25 23:15:51,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:51" (3/3) ... [2022-11-25 23:15:51,070 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound10.i [2022-11-25 23:15:51,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:15:51,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:15:51,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:15:51,159 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;@72f55869, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:15:51,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:15:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:15:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:15:51,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:51,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:51,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:51,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:51,183 INFO L85 PathProgramCache]: Analyzing trace with hash 774102990, now seen corresponding path program 1 times [2022-11-25 23:15:51,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:51,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724588992] [2022-11-25 23:15:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:51,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:51,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:51,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724588992] [2022-11-25 23:15:51,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 23:15:51,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914786615] [2022-11-25 23:15:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:51,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:51,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:51,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:51,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:15:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 23:15:51,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:51,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:15:51,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914786615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:51,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:51,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:15:51,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091564808] [2022-11-25 23:15:51,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:51,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:15:51,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:51,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:15:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:15:51,494 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:51,540 INFO L93 Difference]: Finished difference Result 30 states and 43 transitions. [2022-11-25 23:15:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:15:51,543 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:15:51,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:51,553 INFO L225 Difference]: With dead ends: 30 [2022-11-25 23:15:51,553 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 23:15:51,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:15:51,574 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:51,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:15:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 23:15:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 23:15:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:15:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-25 23:15:51,650 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 7 [2022-11-25 23:15:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:51,651 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-25 23:15:51,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-25 23:15:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:15:51,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:51,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:51,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:51,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 23:15:51,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:51,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1084410172, now seen corresponding path program 1 times [2022-11-25 23:15:51,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:51,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662770677] [2022-11-25 23:15:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:51,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:51,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:51,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662770677] [2022-11-25 23:15:51,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 23:15:51,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957914935] [2022-11-25 23:15:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:51,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:51,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:51,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:51,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:15:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:52,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:15:52,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:52,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:15:52,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957914935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:52,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:52,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:15:52,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410080122] [2022-11-25 23:15:52,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:52,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:15:52,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:52,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:15:52,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:15:52,210 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:52,264 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2022-11-25 23:15:52,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:15:52,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:15:52,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:52,266 INFO L225 Difference]: With dead ends: 28 [2022-11-25 23:15:52,266 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 23:15:52,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:15:52,269 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:52,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:15:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 23:15:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-25 23:15:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:15:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-25 23:15:52,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-11-25 23:15:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:52,276 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-25 23:15:52,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-25 23:15:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:15:52,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:52,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:52,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:52,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:52,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1068718015, now seen corresponding path program 1 times [2022-11-25 23:15:52,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:52,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205737699] [2022-11-25 23:15:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:52,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:52,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:15:52,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622692997] [2022-11-25 23:15:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:52,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:52,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:52,518 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:52,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:15:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:52,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:15:52,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:52,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:15:52,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:52,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205737699] [2022-11-25 23:15:52,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:15:52,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622692997] [2022-11-25 23:15:52,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622692997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:52,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:52,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:15:52,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795844255] [2022-11-25 23:15:52,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:52,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:15:52,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:52,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:15:52,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:15:52,662 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:52,695 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-25 23:15:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:15:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:15:52,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:52,697 INFO L225 Difference]: With dead ends: 28 [2022-11-25 23:15:52,697 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 23:15:52,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:15:52,699 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:52,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:15:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 23:15:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-11-25 23:15:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:15:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-25 23:15:52,707 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2022-11-25 23:15:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:52,707 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-25 23:15:52,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-25 23:15:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:15:52,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:52,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:52,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:52,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:52,919 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1066930555, now seen corresponding path program 1 times [2022-11-25 23:15:52,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:52,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525741722] [2022-11-25 23:15:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:52,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:52,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:15:52,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49694446] [2022-11-25 23:15:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:52,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:52,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:52,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:52,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:15:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:53,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:15:53,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:53,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:15:53,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:53,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525741722] [2022-11-25 23:15:53,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:15:53,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49694446] [2022-11-25 23:15:53,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49694446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:53,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:53,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:15:53,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099917668] [2022-11-25 23:15:53,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:53,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:15:53,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:15:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:15:53,155 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:53,229 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-11-25 23:15:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:15:53,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:15:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:53,231 INFO L225 Difference]: With dead ends: 29 [2022-11-25 23:15:53,232 INFO L226 Difference]: Without dead ends: 26 [2022-11-25 23:15:53,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:15:53,233 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:53,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:15:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-25 23:15:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-25 23:15:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:15:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-25 23:15:53,242 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 10 [2022-11-25 23:15:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:53,243 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-25 23:15:53,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-25 23:15:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:15:53,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:53,244 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:53,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:53,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:53,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1531048614, now seen corresponding path program 1 times [2022-11-25 23:15:53,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:53,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538941130] [2022-11-25 23:15:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:53,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:53,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:15:53,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663682734] [2022-11-25 23:15:53,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:53,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:53,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:53,505 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:53,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:15:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:53,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:15:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:53,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:53,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:53,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538941130] [2022-11-25 23:15:53,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:15:53,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663682734] [2022-11-25 23:15:53,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663682734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:53,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182773469] [2022-11-25 23:15:53,716 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:15:53,723 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:15:53,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:15:53,748 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:15:53,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:15:54,325 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2022-11-25 23:15:54,354 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:15:55,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '470#(and (<= 11 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:15:55,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:15:55,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:15:55,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-25 23:15:55,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137159272] [2022-11-25 23:15:55,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:15:55,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:15:55,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:15:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:15:55,072 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:55,171 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-11-25 23:15:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:15:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:15:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:55,172 INFO L225 Difference]: With dead ends: 57 [2022-11-25 23:15:55,172 INFO L226 Difference]: Without dead ends: 46 [2022-11-25 23:15:55,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:15:55,174 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:55,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 71 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:15:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-25 23:15:55,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2022-11-25 23:15:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:15:55,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-11-25 23:15:55,181 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 12 [2022-11-25 23:15:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:55,182 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-11-25 23:15:55,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-11-25 23:15:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:15:55,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:55,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:55,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:55,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:55,389 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:55,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash -107828201, now seen corresponding path program 1 times [2022-11-25 23:15:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:55,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362830909] [2022-11-25 23:15:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:55,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:55,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:15:55,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052317832] [2022-11-25 23:15:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:55,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:55,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:55,442 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:55,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:15:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:15:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:55,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:55,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:55,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362830909] [2022-11-25 23:15:55,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:15:55,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052317832] [2022-11-25 23:15:55,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052317832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:55,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1847503097] [2022-11-25 23:15:55,601 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:15:55,602 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:15:55,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:15:55,602 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:15:55,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:15:55,824 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-25 23:15:55,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:15:56,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '690#(and (<= 11 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:15:56,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:15:56,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:15:56,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-25 23:15:56,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731808748] [2022-11-25 23:15:56,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:15:56,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:15:56,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:15:56,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:15:56,474 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:56,629 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2022-11-25 23:15:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:15:56,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:15:56,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:56,631 INFO L225 Difference]: With dead ends: 81 [2022-11-25 23:15:56,631 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 23:15:56,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:15:56,633 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:56,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 106 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:15:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 23:15:56,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2022-11-25 23:15:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 56 states have internal predecessors, (69), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 23:15:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2022-11-25 23:15:56,644 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 13 [2022-11-25 23:15:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:56,645 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2022-11-25 23:15:56,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2022-11-25 23:15:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:15:56,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:56,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:56,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:56,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:15:56,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash -106040741, now seen corresponding path program 1 times [2022-11-25 23:15:56,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:56,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345696826] [2022-11-25 23:15:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:56,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:56,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:15:56,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296278515] [2022-11-25 23:15:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:56,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:56,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:56,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:56,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:15:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:56,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:15:56,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:57,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:16:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:16:01,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:16:01,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345696826] [2022-11-25 23:16:01,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:16:01,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296278515] [2022-11-25 23:16:01,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296278515] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:16:01,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:16:01,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2022-11-25 23:16:01,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23534748] [2022-11-25 23:16:01,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:16:01,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:16:01,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:16:01,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:16:01,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:16:01,624 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:16:10,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:12,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:14,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:16,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:19,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:21,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:23,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:26,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:27,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:29,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:30,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:33,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:35,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:37,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:16:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:16:37,622 INFO L93 Difference]: Finished difference Result 114 states and 141 transitions. [2022-11-25 23:16:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:16:37,629 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:16:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:16:37,630 INFO L225 Difference]: With dead ends: 114 [2022-11-25 23:16:37,631 INFO L226 Difference]: Without dead ends: 108 [2022-11-25 23:16:37,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=46, Invalid=135, Unknown=1, NotChecked=0, Total=182 [2022-11-25 23:16:37,632 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:16:37,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 60 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 12 Unknown, 0 Unchecked, 29.5s Time] [2022-11-25 23:16:37,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-25 23:16:37,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2022-11-25 23:16:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 79 states have internal predecessors, (91), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 23:16:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2022-11-25 23:16:37,681 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 13 [2022-11-25 23:16:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:16:37,681 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2022-11-25 23:16:37,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:16:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2022-11-25 23:16:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 23:16:37,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:37,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:37,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:16:37,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 23:16:37,891 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:37,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:37,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1345144360, now seen corresponding path program 1 times [2022-11-25 23:16:37,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:37,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207177811] [2022-11-25 23:16:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:37,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:37,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:16:37,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617173943] [2022-11-25 23:16:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:37,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:37,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:37,904 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:16:37,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:16:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:37,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:16:37,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:16:38,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:16:38,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:16:38,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207177811] [2022-11-25 23:16:38,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:16:38,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617173943] [2022-11-25 23:16:38,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617173943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:16:38,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:16:38,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:16:38,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398672842] [2022-11-25 23:16:38,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:16:38,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:16:38,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:16:38,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:16:38,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:16:38,009 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:16:38,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:16:38,048 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2022-11-25 23:16:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:16:38,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-25 23:16:38,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:16:38,050 INFO L225 Difference]: With dead ends: 129 [2022-11-25 23:16:38,050 INFO L226 Difference]: Without dead ends: 81 [2022-11-25 23:16:38,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:16:38,052 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:16:38,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:16:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-25 23:16:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-25 23:16:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 66 states have internal predecessors, (76), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:16:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-11-25 23:16:38,082 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 18 [2022-11-25 23:16:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:16:38,083 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-11-25 23:16:38,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:16:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-11-25 23:16:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:16:38,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:38,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:38,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:16:38,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:38,304 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1577774082, now seen corresponding path program 1 times [2022-11-25 23:16:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:38,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958402047] [2022-11-25 23:16:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:38,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:38,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:16:38,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724076933] [2022-11-25 23:16:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:38,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:38,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:38,318 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:16:38,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:16:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:38,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:16:38,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:16:38,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:04,829 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (or (let ((.cse3 (* (* (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648) |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse0 4294967296) 4294967296))) (and (< .cse0 (+ .cse1 .cse2 1)) (< (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse1)) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))))) is different from true [2022-11-25 23:17:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-25 23:17:29,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:29,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958402047] [2022-11-25 23:17:29,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:17:29,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724076933] [2022-11-25 23:17:29,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724076933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:29,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [139769697] [2022-11-25 23:17:29,171 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:17:29,171 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:29,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:29,172 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:29,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:30,470 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2022-11-25 23:17:30,499 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:34,689 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1776#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 11) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:34,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:34,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:17:34,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-25 23:17:34,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477181390] [2022-11-25 23:17:34,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:34,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:17:34,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:17:34,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=515, Unknown=1, NotChecked=46, Total=650 [2022-11-25 23:17:34,691 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:17:38,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:17:45,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:17:47,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:17:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:50,139 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2022-11-25 23:17:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:17:50,140 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-25 23:17:50,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:50,142 INFO L225 Difference]: With dead ends: 100 [2022-11-25 23:17:50,142 INFO L226 Difference]: Without dead ends: 94 [2022-11-25 23:17:50,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=112, Invalid=647, Unknown=1, NotChecked=52, Total=812 [2022-11-25 23:17:50,144 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:50,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 93 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 149 Invalid, 1 Unknown, 44 Unchecked, 13.9s Time] [2022-11-25 23:17:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-25 23:17:50,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2022-11-25 23:17:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 64 states have internal predecessors, (71), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:17:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-11-25 23:17:50,164 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 21 [2022-11-25 23:17:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:50,165 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-11-25 23:17:50,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:17:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-11-25 23:17:50,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:17:50,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:50,166 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:50,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:50,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:50,372 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:50,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:50,373 INFO L85 PathProgramCache]: Analyzing trace with hash -617980160, now seen corresponding path program 1 times [2022-11-25 23:17:50,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:50,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496201154] [2022-11-25 23:17:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:50,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:50,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:17:50,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146869578] [2022-11-25 23:17:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:50,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:50,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:50,404 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:50,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:17:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:50,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:17:50,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:17:50,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:17:50,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:50,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496201154] [2022-11-25 23:17:50,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:17:50,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146869578] [2022-11-25 23:17:50,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146869578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:50,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1099088541] [2022-11-25 23:17:50,631 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 23:17:50,631 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:50,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:50,632 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:50,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:50,758 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2022-11-25 23:17:50,783 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:51,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2174#(and (<= 2 ~counter~0) (< ~counter~0 11) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:51,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:51,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:17:51,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-25 23:17:51,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906711495] [2022-11-25 23:17:51,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:51,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:17:51,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:17:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:17:51,417 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:51,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:51,733 INFO L93 Difference]: Finished difference Result 179 states and 200 transitions. [2022-11-25 23:17:51,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 23:17:51,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-25 23:17:51,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:51,735 INFO L225 Difference]: With dead ends: 179 [2022-11-25 23:17:51,736 INFO L226 Difference]: Without dead ends: 166 [2022-11-25 23:17:51,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:17:51,737 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:51,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 126 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:17:51,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-25 23:17:51,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 93. [2022-11-25 23:17:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 79 states have internal predecessors, (90), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:17:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2022-11-25 23:17:51,785 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 21 [2022-11-25 23:17:51,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:51,785 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2022-11-25 23:17:51,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2022-11-25 23:17:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:17:51,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:51,790 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:51,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:51,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:17:51,991 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1160838210, now seen corresponding path program 2 times [2022-11-25 23:17:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:51,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923085458] [2022-11-25 23:17:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:51,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:52,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:17:52,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266478073] [2022-11-25 23:17:52,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:17:52,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:52,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:52,015 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:52,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:17:52,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:17:52,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:17:52,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:17:52,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:17:59,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:18:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:18:21,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:18:21,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923085458] [2022-11-25 23:18:21,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:18:21,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266478073] [2022-11-25 23:18:21,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266478073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:18:21,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928710296] [2022-11-25 23:18:21,500 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:18:21,500 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:18:21,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:18:21,501 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:18:21,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:18:22,982 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2022-11-25 23:18:23,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:18:25,268 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2743#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 11) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:18:25,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:18:25,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:18:25,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-25 23:18:25,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811936911] [2022-11-25 23:18:25,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:18:25,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:18:25,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:18:25,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:18:25,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=516, Unknown=1, NotChecked=0, Total=600 [2022-11-25 23:18:25,270 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:18:29,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-25 23:18:31,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0, 1] [2022-11-25 23:18:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:18:33,000 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2022-11-25 23:18:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:18:33,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-25 23:18:33,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:18:33,003 INFO L225 Difference]: With dead ends: 128 [2022-11-25 23:18:33,003 INFO L226 Difference]: Without dead ends: 123 [2022-11-25 23:18:33,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=90, Invalid=559, Unknown=1, NotChecked=0, Total=650 [2022-11-25 23:18:33,004 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:18:33,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 120 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2022-11-25 23:18:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-25 23:18:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2022-11-25 23:18:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 92 states have (on average 1.141304347826087) internal successors, (105), 97 states have internal predecessors, (105), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 23:18:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2022-11-25 23:18:33,035 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 27 [2022-11-25 23:18:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:18:33,036 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2022-11-25 23:18:33,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:18:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2022-11-25 23:18:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 23:18:33,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:18:33,038 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 23:18:33,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:18:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 23:18:33,244 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:18:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:18:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1293804193, now seen corresponding path program 3 times [2022-11-25 23:18:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:18:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38946892] [2022-11-25 23:18:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:18:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:18:33,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:18:33,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896599622] [2022-11-25 23:18:33,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:18:33,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:18:33,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:18:33,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:18:33,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:18:33,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:18:33,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:18:33,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:18:33,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:18:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:18:33,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:18:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:18:33,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:18:33,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38946892] [2022-11-25 23:18:33,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:18:33,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896599622] [2022-11-25 23:18:33,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896599622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:18:33,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353867988] [2022-11-25 23:18:33,516 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:18:33,517 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:18:33,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:18:33,517 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:18:33,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:18:34,688 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2022-11-25 23:18:34,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:18:35,733 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3267#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 11) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:18:35,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:18:35,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:18:35,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2022-11-25 23:18:35,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792610128] [2022-11-25 23:18:35,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:18:35,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:18:35,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:18:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:18:35,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:18:35,735 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:18:35,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:18:35,818 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2022-11-25 23:18:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:18:35,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-11-25 23:18:35,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:18:35,819 INFO L225 Difference]: With dead ends: 125 [2022-11-25 23:18:35,819 INFO L226 Difference]: Without dead ends: 83 [2022-11-25 23:18:35,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:18:35,821 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:18:35,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:18:35,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-25 23:18:35,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-25 23:18:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 73 states have internal predecessors, (80), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:18:35,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-11-25 23:18:35,833 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 29 [2022-11-25 23:18:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:18:35,834 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-11-25 23:18:35,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:18:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-11-25 23:18:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 23:18:35,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:18:35,835 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-25 23:18:35,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:18:36,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:18:36,048 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:18:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:18:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1729875189, now seen corresponding path program 4 times [2022-11-25 23:18:36,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:18:36,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718935412] [2022-11-25 23:18:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:18:36,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:18:36,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:18:36,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569675658] [2022-11-25 23:18:36,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:18:36,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:18:36,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:18:36,059 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:18:36,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:18:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:18:36,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 23:18:36,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:18:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:18:37,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:19:03,433 WARN L233 SmtUtils]: Spent 11.80s on a formula simplification. DAG size of input: 60 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:19:45,344 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:20:18,070 WARN L233 SmtUtils]: Spent 7.37s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:20:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:20:28,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:28,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718935412] [2022-11-25 23:20:28,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:20:28,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569675658] [2022-11-25 23:20:28,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569675658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:20:28,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993861977] [2022-11-25 23:20:28,826 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:20:28,827 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:20:28,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:20:28,828 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:20:28,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:20:30,171 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2022-11-25 23:20:30,249 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:20:59,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3772#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 11) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:20:59,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:20:59,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:20:59,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-11-25 23:20:59,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715629199] [2022-11-25 23:20:59,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:20:59,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:20:59,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:59,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:20:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=791, Unknown=10, NotChecked=0, Total=930 [2022-11-25 23:20:59,447 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:22:24,886 WARN L233 SmtUtils]: Spent 1.08m on a formula simplification that was a NOOP. DAG size: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:22:26,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:22:28,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:22:30,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:22:32,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:22:58,441 WARN L233 SmtUtils]: Spent 21.82s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:23:00,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:06,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:08,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:10,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:12,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:15,623 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse13 (* 4294967295 |c_ULTIMATE.start_main_~r~0#1|)) (.cse8 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse15 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse14 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (and (let ((.cse5 (div .cse15 2))) (let ((.cse1 (mod .cse5 4294967296))) (or (let ((.cse10 (div .cse1 2)) (.cse12 (* .cse5 |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse0 (not (= (mod (+ .cse13 |c_ULTIMATE.start_main_~A~0#1| (* 4294967294 .cse5 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0))) (.cse3 (* 2 .cse12)) (.cse7 (* 4 (* .cse10 |c_ULTIMATE.start_main_~q~0#1|))) (.cse9 (* (- 2) .cse12))) (and (or .cse0 (not (<= .cse1 .cse2)) (let ((.cse6 (* .cse10 2))) (let ((.cse4 (* 4294967296 (div (+ .cse6 .cse7 .cse8 .cse9 (- .cse5)) 4294967296)))) (and (< (+ .cse3 .cse4 .cse5) (+ .cse6 .cse7 1)) (< (+ .cse6 .cse7) (+ .cse3 .cse4 .cse5 1)))))) (or .cse0 (let ((.cse11 (* (div (+ .cse7 .cse8 .cse9) 4294967296) 4294967296))) (and (< (+ .cse3 .cse11) (+ .cse7 1)) (< .cse7 (+ .cse3 .cse11 1)))))))) (= .cse1 .cse14)))) (let ((.cse16 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648))) (let ((.cse23 (mod .cse16 4294967296))) (or (not (= (mod (+ (* 4294967294 .cse16 |c_ULTIMATE.start_main_~q~0#1|) .cse13 |c_ULTIMATE.start_main_~A~0#1|) 4294967296) 0)) (<= (* 2 .cse16) .cse2) (let ((.cse22 (div .cse23 2))) (let ((.cse17 (* 2 .cse22)) (.cse18 (* (* .cse22 |c_ULTIMATE.start_main_~q~0#1|) 4)) (.cse21 (* .cse16 |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse19 (* .cse21 2)) (.cse20 (* (div (+ (- .cse16) .cse17 (* (- 2) .cse21) .cse8 .cse18) 4294967296) 4294967296))) (and (< (+ .cse17 .cse18) (+ .cse16 .cse19 1 .cse20)) (< (+ .cse16 .cse19 .cse20) (+ .cse17 .cse18 1)))))) (not (<= .cse15 .cse2)) (= .cse14 .cse23)))))) is different from true [2022-11-25 23:23:20,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:22,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:24,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:36,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:38,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:40,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:41,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:23:43,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:09,912 WARN L233 SmtUtils]: Spent 16.84s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:24:11,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:13,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:15,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:17,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:19,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:21,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:24,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:28,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:30,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:34,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:36,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:39,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:43,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:24:44,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:25:38,095 WARN L233 SmtUtils]: Spent 37.39s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:25:40,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:25:41,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:25:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:25:41,392 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2022-11-25 23:25:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 23:25:41,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2022-11-25 23:25:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:25:41,394 INFO L225 Difference]: With dead ends: 117 [2022-11-25 23:25:41,394 INFO L226 Difference]: Without dead ends: 89 [2022-11-25 23:25:41,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 277.7s TimeCoverageRelationStatistics Valid=222, Invalid=1240, Unknown=24, NotChecked=74, Total=1560 [2022-11-25 23:25:41,395 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 31 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 76.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:25:41,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 178 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 216 Invalid, 24 Unknown, 6 Unchecked, 76.4s Time] [2022-11-25 23:25:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-25 23:25:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-25 23:25:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 77 states have internal predecessors, (83), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 23:25:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2022-11-25 23:25:41,461 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 32 [2022-11-25 23:25:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:25:41,464 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2022-11-25 23:25:41,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:25:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2022-11-25 23:25:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 23:25:41,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:25:41,468 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-25 23:25:41,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:25:41,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 23:25:41,674 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:25:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:25:41,674 INFO L85 PathProgramCache]: Analyzing trace with hash 630360000, now seen corresponding path program 1 times [2022-11-25 23:25:41,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:25:41,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353803138] [2022-11-25 23:25:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:25:41,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:25:41,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:25:41,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023972957] [2022-11-25 23:25:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:25:41,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:25:41,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:25:41,691 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:25:41,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 23:25:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:25:41,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:25:41,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:25:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:25:41,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:25:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:25:42,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:25:42,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353803138] [2022-11-25 23:25:42,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:25:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023972957] [2022-11-25 23:25:42,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023972957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:25:42,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1399980506] [2022-11-25 23:25:42,053 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:25:42,053 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:25:42,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:25:42,054 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:25:42,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:25:43,242 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-25 23:25:43,248 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:25:44,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4356#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:25:44,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:25:44,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:25:44,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2022-11-25 23:25:44,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348683090] [2022-11-25 23:25:44,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:25:44,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:25:44,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:25:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:25:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:25:44,340 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 23:25:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:25:44,622 INFO L93 Difference]: Finished difference Result 203 states and 216 transitions. [2022-11-25 23:25:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:25:44,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-11-25 23:25:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:25:44,629 INFO L225 Difference]: With dead ends: 203 [2022-11-25 23:25:44,629 INFO L226 Difference]: Without dead ends: 196 [2022-11-25 23:25:44,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:25:44,630 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:25:44,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 97 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:25:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-25 23:25:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 177. [2022-11-25 23:25:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 139 states have (on average 1.0863309352517985) internal successors, (151), 145 states have internal predecessors, (151), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (19), 14 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 23:25:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 190 transitions. [2022-11-25 23:25:44,693 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 190 transitions. Word has length 43 [2022-11-25 23:25:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:25:44,693 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 190 transitions. [2022-11-25 23:25:44,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 23:25:44,694 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 190 transitions. [2022-11-25 23:25:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 23:25:44,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:25:44,695 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-25 23:25:44,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:25:44,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:25:44,898 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:25:44,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:25:44,899 INFO L85 PathProgramCache]: Analyzing trace with hash 632147460, now seen corresponding path program 5 times [2022-11-25 23:25:44,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:25:44,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050827161] [2022-11-25 23:25:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:25:44,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:25:44,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:25:44,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915774196] [2022-11-25 23:25:44,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:25:44,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:25:44,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:25:44,911 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:25:44,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7c9229-bcbc-46fd-af5a-998c9cd22ba0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process