./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/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_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/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_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/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 dcebefc76bde79b9a5fa67feebc75881761b0a4209b78516b385f787f62f9340 --- 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 [2022-11-26 00:08:17,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:08:17,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:08:17,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:08:17,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:08:17,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:08:17,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:08:17,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:08:17,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:08:17,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:08:17,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:08:17,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:08:17,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:08:17,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:08:17,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:08:17,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:08:17,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:08:17,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:08:17,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:08:17,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:08:17,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:08:17,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:08:17,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:08:17,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:08:17,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:08:17,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:08:17,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:08:17,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:08:17,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:08:17,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:08:17,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:08:17,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:08:17,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:08:17,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:08:17,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:08:17,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:08:17,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:08:17,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:08:17,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:08:17,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:08:17,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:08:17,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:08:17,658 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:08:17,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:08:17,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:08:17,659 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:08:17,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:08:17,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:08:17,660 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:08:17,661 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:08:17,661 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:08:17,661 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:08:17,662 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:08:17,662 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:08:17,662 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:08:17,662 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:08:17,662 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:08:17,663 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:08:17,663 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:08:17,663 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:08:17,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:08:17,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:08:17,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:08:17,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:08:17,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:08:17,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:08:17,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:08:17,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:08:17,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:08:17,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:08:17,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:08:17,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:08:17,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:08:17,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:08:17,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:08:17,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:08:17,668 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:08:17,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:08:17,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:08:17,668 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:08:17,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:08:17,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:08:17,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:08:17,669 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_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dcebefc76bde79b9a5fa67feebc75881761b0a4209b78516b385f787f62f9340 [2022-11-26 00:08:17,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:08:17,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:08:17,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:08:17,932 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:08:17,934 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:08:17,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-11-26 00:08:21,027 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:08:21,249 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:08:21,249 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-11-26 00:08:21,257 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/data/473cf214a/06fb2198255e4137ae4474b8299a9bdf/FLAG208567cb3 [2022-11-26 00:08:21,278 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/data/473cf214a/06fb2198255e4137ae4474b8299a9bdf [2022-11-26 00:08:21,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:08:21,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:08:21,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:08:21,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:08:21,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:08:21,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe07b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21, skipping insertion in model container [2022-11-26 00:08:21,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:08:21,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:08:21,461 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_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c[458,471] [2022-11-26 00:08:21,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:08:21,485 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:08:21,495 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_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c[458,471] [2022-11-26 00:08:21,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:08:21,515 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:08:21,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21 WrapperNode [2022-11-26 00:08:21,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:08:21,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:08:21,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:08:21,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:08:21,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,548 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-11-26 00:08:21,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:08:21,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:08:21,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:08:21,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:08:21,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:08:21,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:08:21,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:08:21,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:08:21,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (1/1) ... [2022-11-26 00:08:21,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:08:21,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:21,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:08:21,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:08:21,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:08:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:08:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:08:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:08:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:08:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:08:21,732 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:08:21,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:08:21,950 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:08:22,012 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:08:22,012 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:08:22,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:08:22 BoogieIcfgContainer [2022-11-26 00:08:22,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:08:22,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:08:22,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:08:22,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:08:22,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:08:21" (1/3) ... [2022-11-26 00:08:22,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e091808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:08:22, skipping insertion in model container [2022-11-26 00:08:22,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:08:21" (2/3) ... [2022-11-26 00:08:22,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e091808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:08:22, skipping insertion in model container [2022-11-26 00:08:22,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:08:22" (3/3) ... [2022-11-26 00:08:22,042 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound50.c [2022-11-26 00:08:22,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:08:22,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:08:22,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:08:22,156 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;@25d26497, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:08:22,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:08:22,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:08:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:08:22,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:22,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:08:22,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:08:22,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:22,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1757604175, now seen corresponding path program 1 times [2022-11-26 00:08:22,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:08:22,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564634340] [2022-11-26 00:08:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:22,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:08:22,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:08:22,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764570952] [2022-11-26 00:08:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:22,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:22,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:22,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:22,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:08:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:22,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:08:22,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:22,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:08:22,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:08:22,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564634340] [2022-11-26 00:08:22,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:08:22,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764570952] [2022-11-26 00:08:22,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764570952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:08:22,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:08:22,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:08:22,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376852919] [2022-11-26 00:08:22,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:08:22,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:08:22,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:08:22,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:08:22,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:08:22,683 INFO L87 Difference]: Start difference. First operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-26 00:08:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:22,807 INFO L93 Difference]: Finished difference Result 38 states and 56 transitions. [2022-11-26 00:08:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:08:22,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-11-26 00:08:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:22,818 INFO L225 Difference]: With dead ends: 38 [2022-11-26 00:08:22,818 INFO L226 Difference]: Without dead ends: 19 [2022-11-26 00:08:22,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:08:22,829 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:22,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 35 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:08:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-26 00:08:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-26 00:08:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:08:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-26 00:08:22,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 6 [2022-11-26 00:08:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:22,879 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-26 00:08:22,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-26 00:08:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-26 00:08:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:08:22,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:22,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:08:22,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:08:23,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:08:23,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:08:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash -19935186, now seen corresponding path program 1 times [2022-11-26 00:08:23,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:08:23,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708945817] [2022-11-26 00:08:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:23,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:08:23,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:08:23,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638297987] [2022-11-26 00:08:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:23,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:23,108 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:23,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:08:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:23,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:08:23,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:23,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:23,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:08:23,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708945817] [2022-11-26 00:08:23,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:08:23,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638297987] [2022-11-26 00:08:23,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638297987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:23,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [810874784] [2022-11-26 00:08:23,753 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:08:23,754 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:08:23,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:08:23,763 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:08:23,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:08:24,640 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-11-26 00:08:24,673 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:08:24,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '205#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:08:24,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:08:24,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:08:24,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-11-26 00:08:24,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201035684] [2022-11-26 00:08:24,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:08:24,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:08:24,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:08:24,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:08:24,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:08:24,991 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 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) [2022-11-26 00:08:25,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:25,132 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-26 00:08:25,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:08:25,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 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 13 [2022-11-26 00:08:25,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:25,134 INFO L225 Difference]: With dead ends: 30 [2022-11-26 00:08:25,134 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 00:08:25,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:08:25,135 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:25,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:08:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 00:08:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-11-26 00:08:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:08:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-11-26 00:08:25,143 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2022-11-26 00:08:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:25,144 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-11-26 00:08:25,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 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) [2022-11-26 00:08:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-11-26 00:08:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:08:25,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:25,145 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:08:25,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:08:25,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:25,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:08:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:25,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1489129899, now seen corresponding path program 1 times [2022-11-26 00:08:25,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:08:25,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235782016] [2022-11-26 00:08:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:25,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:08:25,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:08:25,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520704949] [2022-11-26 00:08:25,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:25,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:25,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:25,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:25,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:08:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:25,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:08:25,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:08:25,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:57,868 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17|))))) is different from true [2022-11-26 00:09:16,041 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_17|))))) is different from true [2022-11-26 00:09:22,099 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:09:24,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:24,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235782016] [2022-11-26 00:09:24,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:09:24,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520704949] [2022-11-26 00:09:24,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520704949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:24,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158055380] [2022-11-26 00:09:24,156 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:09:24,156 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:09:24,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:09:24,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:09:24,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:09:24,799 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-11-26 00:09:24,933 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:09:25,689 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '395#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:09:25,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:09:25,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:09:25,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-26 00:09:25,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219365241] [2022-11-26 00:09:25,689 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:09:25,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:09:25,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:25,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:09:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=314, Unknown=7, NotChecked=114, Total=506 [2022-11-26 00:09:25,691 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) [2022-11-26 00:09:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:25,838 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-11-26 00:09:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:09:25,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) Word has length 19 [2022-11-26 00:09:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:25,840 INFO L225 Difference]: With dead ends: 28 [2022-11-26 00:09:25,840 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:09:25,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=93, Invalid=418, Unknown=7, NotChecked=132, Total=650 [2022-11-26 00:09:25,842 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:25,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:09:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:09:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-26 00:09:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:09:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-11-26 00:09:25,850 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2022-11-26 00:09:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:25,851 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-11-26 00:09:25,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) [2022-11-26 00:09:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-11-26 00:09:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 00:09:25,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:25,852 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2022-11-26 00:09:25,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:26,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:26,053 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash -563106994, now seen corresponding path program 2 times [2022-11-26 00:09:26,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:26,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296234500] [2022-11-26 00:09:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:26,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:26,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:09:26,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807269525] [2022-11-26 00:09:26,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:09:26,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:26,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:26,071 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:26,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:09:26,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:09:26,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:09:26,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:09:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:09:26,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:09:30,678 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:09:30,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:30,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296234500] [2022-11-26 00:09:30,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:09:30,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807269525] [2022-11-26 00:09:30,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807269525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:30,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278855994] [2022-11-26 00:09:30,685 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:09:30,685 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:09:30,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:09:30,686 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:09:30,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:09:31,463 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-26 00:09:31,469 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:09:31,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '610#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:09:31,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:09:31,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:09:31,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-26 00:09:31,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363438494] [2022-11-26 00:09:31,948 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:09:31,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:09:31,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:31,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:09:31,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=355, Unknown=1, NotChecked=38, Total=462 [2022-11-26 00:09:31,949 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:09:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:32,169 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-11-26 00:09:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:09:32,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-11-26 00:09:32,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:32,172 INFO L225 Difference]: With dead ends: 31 [2022-11-26 00:09:32,172 INFO L226 Difference]: Without dead ends: 26 [2022-11-26 00:09:32,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=89, Invalid=466, Unknown=1, NotChecked=44, Total=600 [2022-11-26 00:09:32,174 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:32,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:09:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-26 00:09:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-26 00:09:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:09:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-11-26 00:09:32,189 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 26 [2022-11-26 00:09:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:32,189 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-11-26 00:09:32,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:09:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-11-26 00:09:32,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:09:32,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:32,191 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-11-26 00:09:32,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:32,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:32,397 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:32,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2031862859, now seen corresponding path program 3 times [2022-11-26 00:09:32,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:32,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560565233] [2022-11-26 00:09:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:32,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:32,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:09:32,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252780841] [2022-11-26 00:09:32,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:09:32,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:32,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:32,415 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:32,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:09:32,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:09:32,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:09:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:09:32,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:09:32,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:10:09,029 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42|) (* 2 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 4) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50|) 4)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 3)) 4) 0)))) is different from true [2022-11-26 00:10:27,083 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42|) (* 2 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 4) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50|) 4)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_50| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-26 00:10:33,135 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 6) 9) (+ (* 3 |ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 2)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:10:35,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:35,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560565233] [2022-11-26 00:10:35,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:10:35,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252780841] [2022-11-26 00:10:35,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252780841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:10:35,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [692924482] [2022-11-26 00:10:35,163 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:10:35,164 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:10:35,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:10:35,164 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:10:35,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:10:35,629 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-11-26 00:10:35,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:10:36,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '903#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:10:36,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:10:36,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:10:36,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-26 00:10:36,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527942330] [2022-11-26 00:10:36,477 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:10:36,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:10:36,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:10:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=469, Unknown=7, NotChecked=138, Total=702 [2022-11-26 00:10:36,478 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:10:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:36,732 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-11-26 00:10:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:10:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2022-11-26 00:10:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:36,735 INFO L225 Difference]: With dead ends: 34 [2022-11-26 00:10:36,735 INFO L226 Difference]: Without dead ends: 29 [2022-11-26 00:10:36,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=109, Invalid=598, Unknown=7, NotChecked=156, Total=870 [2022-11-26 00:10:36,738 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:36,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:10:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-26 00:10:36,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-26 00:10:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:10:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-26 00:10:36,748 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 33 [2022-11-26 00:10:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:36,749 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-26 00:10:36,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:10:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-26 00:10:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:10:36,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:36,752 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2022-11-26 00:10:36,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:10:36,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:10:36,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:36,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:36,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1968307026, now seen corresponding path program 4 times [2022-11-26 00:10:36,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:36,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092595984] [2022-11-26 00:10:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:36,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:36,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:10:36,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356902531] [2022-11-26 00:10:36,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:10:36,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:10:36,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:10:36,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:10:36,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:10:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:37,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:10:37,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:10:37,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:11:15,617 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_58| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_58|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 3)) 4) 0)))) is different from true [2022-11-26 00:11:33,669 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_58| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_58|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-26 00:11:49,873 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 2 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4) 4)) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:12:16,463 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 3)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 16 (* |c_ULTIMATE.start_main_~y~0#1| 8)) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:12:18,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092595984] [2022-11-26 00:12:18,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:12:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356902531] [2022-11-26 00:12:18,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356902531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155176649] [2022-11-26 00:12:18,495 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:12:18,495 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:18,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:18,496 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:18,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:18,986 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-11-26 00:12:19,067 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:34,219 WARN L233 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 62 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:12:36,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1250#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:12:36,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:36,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:12:36,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-26 00:12:36,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356926580] [2022-11-26 00:12:36,675 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:36,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:12:36,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:36,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:12:36,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=511, Unknown=12, NotChecked=196, Total=812 [2022-11-26 00:12:36,678 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:12:36,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:36,939 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-26 00:12:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:12:36,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2022-11-26 00:12:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:36,940 INFO L225 Difference]: With dead ends: 37 [2022-11-26 00:12:36,941 INFO L226 Difference]: Without dead ends: 32 [2022-11-26 00:12:36,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 58.6s TimeCoverageRelationStatistics Valid=115, Invalid=645, Unknown=12, NotChecked=220, Total=992 [2022-11-26 00:12:36,942 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:36,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 82 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:12:36,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-26 00:12:36,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-26 00:12:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:12:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-26 00:12:36,953 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 40 [2022-11-26 00:12:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:36,953 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-26 00:12:36,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:12:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-26 00:12:36,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-26 00:12:36,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:36,955 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1] [2022-11-26 00:12:36,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 00:12:37,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:37,161 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1747459819, now seen corresponding path program 5 times [2022-11-26 00:12:37,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:37,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100936327] [2022-11-26 00:12:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:37,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:37,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:12:37,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633545256] [2022-11-26 00:12:37,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:12:37,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:37,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:37,186 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:37,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:12:37,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:12:37,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:12:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-26 00:12:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 00:12:37,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:37,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:37,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100936327] [2022-11-26 00:12:37,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:12:37,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633545256] [2022-11-26 00:12:37,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633545256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:37,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307216180] [2022-11-26 00:12:37,680 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:12:37,680 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:37,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:37,681 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:37,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:38,260 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-26 00:12:38,264 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:38,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1560#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:12:38,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:38,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:12:38,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-26 00:12:38,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515991893] [2022-11-26 00:12:38,724 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:38,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:12:38,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:38,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:12:38,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:12:38,726 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:12:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:39,016 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-26 00:12:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:12:39,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 47 [2022-11-26 00:12:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:39,017 INFO L225 Difference]: With dead ends: 40 [2022-11-26 00:12:39,017 INFO L226 Difference]: Without dead ends: 35 [2022-11-26 00:12:39,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:12:39,019 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:39,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 95 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:12:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-26 00:12:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-26 00:12:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:12:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-11-26 00:12:39,030 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 47 [2022-11-26 00:12:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:39,030 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-11-26 00:12:39,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:12:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-11-26 00:12:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:12:39,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:39,032 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1] [2022-11-26 00:12:39,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:39,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:39,239 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash -324766194, now seen corresponding path program 6 times [2022-11-26 00:12:39,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:39,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930887770] [2022-11-26 00:12:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:39,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:39,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:12:39,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283872899] [2022-11-26 00:12:39,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:12:39,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:39,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:39,251 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:39,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:12:39,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:12:39,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:12:39,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:12:39,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-26 00:12:39,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:39,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:39,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930887770] [2022-11-26 00:12:39,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:12:39,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283872899] [2022-11-26 00:12:39,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283872899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:39,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [814908434] [2022-11-26 00:12:39,798 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:12:39,798 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:39,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:39,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:39,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:40,217 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-11-26 00:12:40,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:41,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1902#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:12:41,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:41,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:12:41,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-26 00:12:41,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648104278] [2022-11-26 00:12:41,011 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:41,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:12:41,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:41,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:12:41,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:12:41,013 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:12:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:41,405 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-11-26 00:12:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:12:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 54 [2022-11-26 00:12:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:41,409 INFO L225 Difference]: With dead ends: 43 [2022-11-26 00:12:41,409 INFO L226 Difference]: Without dead ends: 38 [2022-11-26 00:12:41,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:12:41,410 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:41,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 124 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:12:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-26 00:12:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-26 00:12:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:12:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-11-26 00:12:41,432 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 54 [2022-11-26 00:12:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:41,433 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-11-26 00:12:41,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:12:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-11-26 00:12:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-26 00:12:41,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:41,439 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2022-11-26 00:12:41,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:41,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:12:41,643 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:41,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1588683147, now seen corresponding path program 7 times [2022-11-26 00:12:41,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:41,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535159386] [2022-11-26 00:12:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:41,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:41,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:12:41,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903533130] [2022-11-26 00:12:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:12:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:41,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:41,653 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:41,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:12:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:41,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-26 00:12:41,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-26 00:12:42,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:46,148 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:13:02,222 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_100| Int)) (or (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 2)) 4)) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_100|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127|))))) is different from true [2022-11-26 00:13:20,284 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_100| Int)) (or (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| 2)) 4)) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_100|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_127|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-26 00:13:26,324 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:13:28,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:28,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535159386] [2022-11-26 00:13:28,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:13:28,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903533130] [2022-11-26 00:13:28,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903533130] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:28,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [685899098] [2022-11-26 00:13:28,350 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:13:28,350 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:13:28,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:13:28,351 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:13:28,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:13:28,769 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-11-26 00:13:28,836 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:13:34,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2279#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:13:34,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:13:34,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:13:34,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-26 00:13:34,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362522615] [2022-11-26 00:13:34,047 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:34,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:13:34,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:13:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=534, Unknown=4, NotChecked=196, Total=812 [2022-11-26 00:13:34,049 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:13:34,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:34,453 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-11-26 00:13:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:13:34,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 61 [2022-11-26 00:13:34,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:34,455 INFO L225 Difference]: With dead ends: 46 [2022-11-26 00:13:34,455 INFO L226 Difference]: Without dead ends: 41 [2022-11-26 00:13:34,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=99, Invalid=669, Unknown=4, NotChecked=220, Total=992 [2022-11-26 00:13:34,456 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:34,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 148 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:13:34,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-26 00:13:34,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-26 00:13:34,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:13:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-11-26 00:13:34,469 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 61 [2022-11-26 00:13:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:34,470 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-11-26 00:13:34,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:13:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-11-26 00:13:34,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:13:34,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:34,471 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1] [2022-11-26 00:13:34,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:34,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:34,678 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:34,678 INFO L85 PathProgramCache]: Analyzing trace with hash 877199214, now seen corresponding path program 8 times [2022-11-26 00:13:34,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:34,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373662023] [2022-11-26 00:13:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:34,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:34,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:13:34,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373767070] [2022-11-26 00:13:34,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:13:34,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:34,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:34,690 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:34,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:13:34,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-26 00:13:34,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:34,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-26 00:13:34,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 29 proven. 121 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-26 00:13:35,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:21,740 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124| 4)) (+ 16 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 8) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152|))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 3)) 4) 0)))) is different from true [2022-11-26 00:14:39,793 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_124| 4)) (+ 16 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 8) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152|))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_152| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-26 00:14:45,831 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 25) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 5 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:14:53,893 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 12) 36) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 6 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:15:30,087 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 7)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 8) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |ULTIMATE.start_main_~k~0#1| 8) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 64 (* |c_ULTIMATE.start_main_~y~0#1| 16))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:15:32,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:32,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373662023] [2022-11-26 00:15:32,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:15:32,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373767070] [2022-11-26 00:15:32,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373767070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1044919292] [2022-11-26 00:15:32,118 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:15:32,118 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:32,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:32,119 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:32,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:32,675 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-26 00:15:32,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:33,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2842#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:33,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:33,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:15:33,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-26 00:15:33,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896209166] [2022-11-26 00:15:33,235 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:33,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:15:33,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:33,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:15:33,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=849, Unknown=12, NotChecked=320, Total=1332 [2022-11-26 00:15:33,238 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:15:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:33,743 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-11-26 00:15:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:15:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 68 [2022-11-26 00:15:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:33,744 INFO L225 Difference]: With dead ends: 49 [2022-11-26 00:15:33,744 INFO L226 Difference]: Without dead ends: 44 [2022-11-26 00:15:33,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=171, Invalid=1027, Unknown=12, NotChecked=350, Total=1560 [2022-11-26 00:15:33,746 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:33,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 164 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:15:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-26 00:15:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-26 00:15:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-11-26 00:15:33,760 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 68 [2022-11-26 00:15:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:33,761 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-11-26 00:15:33,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:15:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-11-26 00:15:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:15:33,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:33,762 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1] [2022-11-26 00:15:33,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:33,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:33,975 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1812040747, now seen corresponding path program 9 times [2022-11-26 00:15:33,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:33,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145085785] [2022-11-26 00:15:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:33,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:33,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:15:33,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448189404] [2022-11-26 00:15:33,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:15:33,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:33,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:33,988 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:34,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:15:34,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:15:34,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:34,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-26 00:15:34,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 19 proven. 163 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-26 00:15:34,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:34,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145085785] [2022-11-26 00:15:34,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:15:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448189404] [2022-11-26 00:15:34,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448189404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313328641] [2022-11-26 00:15:34,641 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:15:34,641 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:34,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:34,642 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:34,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:35,052 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-11-26 00:15:35,122 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:35,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3280#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:35,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:35,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:15:35,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-26 00:15:35,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915312576] [2022-11-26 00:15:35,962 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:35,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:15:35,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:35,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:15:35,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:15:35,963 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:36,448 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-11-26 00:15:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:15:36,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 75 [2022-11-26 00:15:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:36,450 INFO L225 Difference]: With dead ends: 52 [2022-11-26 00:15:36,450 INFO L226 Difference]: Without dead ends: 47 [2022-11-26 00:15:36,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:15:36,451 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:36,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 202 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:15:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-26 00:15:36,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-26 00:15:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-26 00:15:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-11-26 00:15:36,464 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 75 [2022-11-26 00:15:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:36,465 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-11-26 00:15:36,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:15:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-11-26 00:15:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 00:15:36,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:36,467 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1] [2022-11-26 00:15:36,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:36,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:36,673 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:36,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1796317390, now seen corresponding path program 10 times [2022-11-26 00:15:36,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:36,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506056845] [2022-11-26 00:15:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:36,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:36,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:15:36,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295783302] [2022-11-26 00:15:36,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:15:36,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:36,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:36,685 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:36,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:15:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:36,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-26 00:15:36,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 51 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-26 00:15:37,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:21,616 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_162| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_162|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 2)) 4) 0)))) is different from true [2022-11-26 00:16:39,673 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_162| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_162|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_200| 2)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-26 00:17:05,812 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 2 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4) 4)) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:17:54,144 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 25) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 5 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:18:26,419 WARN L837 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 49 (* |c_ULTIMATE.start_main_~y~0#1| 14)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 7 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 7) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:19:40,579 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 20) 100) (+ (* |ULTIMATE.start_main_~k~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 10) |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 9)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:19:44,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:44,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506056845] [2022-11-26 00:19:44,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:19:44,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295783302] [2022-11-26 00:19:44,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295783302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:44,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035820853] [2022-11-26 00:19:44,845 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:19:44,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:19:44,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:19:44,845 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:19:44,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:19:45,255 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-11-26 00:19:45,324 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:19:48,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3951#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:19:48,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:19:48,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:19:48,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-26 00:19:48,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287845852] [2022-11-26 00:19:48,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:19:48,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:19:48,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:19:48,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1013, Unknown=27, NotChecked=426, Total=1640 [2022-11-26 00:19:48,290 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-26 00:19:48,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:48,944 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-11-26 00:19:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:19:48,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 82 [2022-11-26 00:19:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:48,947 INFO L225 Difference]: With dead ends: 55 [2022-11-26 00:19:48,947 INFO L226 Difference]: Without dead ends: 50 [2022-11-26 00:19:48,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 151.9s TimeCoverageRelationStatistics Valid=196, Invalid=1207, Unknown=27, NotChecked=462, Total=1892 [2022-11-26 00:19:48,949 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:48,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 220 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:19:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-26 00:19:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-26 00:19:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-26 00:19:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-26 00:19:48,965 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 82 [2022-11-26 00:19:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:48,965 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-26 00:19:48,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-26 00:19:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-26 00:19:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-26 00:19:48,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:48,968 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1] [2022-11-26 00:19:48,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:49,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:19:49,174 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:49,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:49,175 INFO L85 PathProgramCache]: Analyzing trace with hash 367173323, now seen corresponding path program 11 times [2022-11-26 00:19:49,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:49,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9142383] [2022-11-26 00:19:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:49,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:49,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:19:49,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271228238] [2022-11-26 00:19:49,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:19:49,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:49,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:49,187 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:49,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:19:49,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-26 00:19:49,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:49,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-26 00:19:49,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 44 proven. 211 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-26 00:19:50,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:54,517 WARN L837 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 16 (* |c_ULTIMATE.start_main_~y~0#1| 8)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 4 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:20:14,574 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 2)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198| 4) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198|)) (+ 16 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 8) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237|)))))) is different from true [2022-11-26 00:20:32,626 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 2)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198| 4) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_198|)) (+ 16 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 8) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237|))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-26 00:20:39,089 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 25) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 5 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:20:47,152 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 12) 36) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 6 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:22:17,537 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 20) 100) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 10 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 10) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 9) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:22:25,605 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 10)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 11) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 22) 121) (+ (* |ULTIMATE.start_main_~k~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-26 00:22:27,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9142383] [2022-11-26 00:22:27,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:22:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271228238] [2022-11-26 00:22:27,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271228238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236071590] [2022-11-26 00:22:27,637 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:22:27,637 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:27,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:27,637 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:27,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:28,028 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-11-26 00:22:28,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:29,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4676#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:29,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:29,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:22:29,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-11-26 00:22:29,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869390412] [2022-11-26 00:22:29,071 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:29,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:22:29,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:29,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:22:29,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1082, Unknown=15, NotChecked=518, Total=1806 [2022-11-26 00:22:29,073 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-26 00:22:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:31,708 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-11-26 00:22:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:22:31,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 89 [2022-11-26 00:22:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:31,710 INFO L225 Difference]: With dead ends: 58 [2022-11-26 00:22:31,710 INFO L226 Difference]: Without dead ends: 53 [2022-11-26 00:22:31,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 82.2s TimeCoverageRelationStatistics Valid=212, Invalid=1282, Unknown=16, NotChecked=560, Total=2070 [2022-11-26 00:22:31,711 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:31,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 251 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:22:31,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-26 00:22:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-26 00:22:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:22:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2022-11-26 00:22:31,727 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 89 [2022-11-26 00:22:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:31,727 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2022-11-26 00:22:31,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-26 00:22:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2022-11-26 00:22:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:22:31,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:31,729 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1] [2022-11-26 00:22:31,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:31,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:22:31,931 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash -738960850, now seen corresponding path program 12 times [2022-11-26 00:22:31,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:31,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553164850] [2022-11-26 00:22:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:31,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:31,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:22:31,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107944691] [2022-11-26 00:22:31,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:22:31,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:31,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:31,942 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:31,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:22:32,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:22:32,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:22:32,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-26 00:22:32,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 25 proven. 271 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-26 00:22:32,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:32,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:32,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553164850] [2022-11-26 00:22:32,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:22:32,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107944691] [2022-11-26 00:22:32,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107944691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:32,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068766597] [2022-11-26 00:22:32,960 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:22:32,960 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:22:32,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:22:32,960 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:22:32,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:22:33,331 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2022-11-26 00:22:33,403 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:22:41,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5210#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:22:41,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:22:41,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:22:41,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-26 00:22:41,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293714852] [2022-11-26 00:22:41,387 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:41,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:22:41,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:41,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:22:41,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=835, Unknown=2, NotChecked=0, Total=930 [2022-11-26 00:22:41,389 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:22:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:42,113 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-11-26 00:22:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:22:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 96 [2022-11-26 00:22:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:42,114 INFO L225 Difference]: With dead ends: 61 [2022-11-26 00:22:42,114 INFO L226 Difference]: Without dead ends: 56 [2022-11-26 00:22:42,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=114, Invalid=1006, Unknown=2, NotChecked=0, Total=1122 [2022-11-26 00:22:42,115 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:42,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 284 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:22:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-26 00:22:42,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-26 00:22:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:22:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-11-26 00:22:42,131 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 96 [2022-11-26 00:22:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:42,132 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-11-26 00:22:42,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:22:42,132 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-11-26 00:22:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-26 00:22:42,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:42,134 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1] [2022-11-26 00:22:42,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:42,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:42,343 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash -123823765, now seen corresponding path program 13 times [2022-11-26 00:22:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:42,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853218577] [2022-11-26 00:22:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:42,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:42,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:22:42,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082268870] [2022-11-26 00:22:42,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:22:42,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:42,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:42,359 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:42,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb2463d-46c2-4d71-afa7-1f4365bc87cc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:22:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:42,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-26 00:22:42,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 66 proven. 274 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-11-26 00:22:43,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:23:27,327 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_230| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_230|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| 2)) 4) 0)))) is different from true [2022-11-26 00:23:45,378 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_230| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_230|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_294| 2)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true