./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 376367d14f0ef5deff3321a7267050cf9f2383eb99d0a19dad6a556c0772ff28 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:20:15,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:20:15,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:20:15,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:20:15,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:20:15,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:20:15,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:20:15,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:20:15,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:20:15,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:20:15,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:20:15,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:20:15,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:20:15,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:20:15,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:20:15,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:20:15,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:20:15,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:20:15,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:20:15,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:20:15,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:20:15,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:20:15,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:20:15,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:20:15,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:20:15,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:20:15,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:20:15,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:20:15,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:20:15,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:20:15,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:20:15,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:20:15,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:20:15,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:20:15,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:20:15,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:20:15,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:20:15,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:20:15,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:20:15,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:20:15,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:20:15,360 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:20:15,374 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:20:15,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:20:15,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:20:15,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:20:15,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:20:15,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:20:15,379 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:20:15,380 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:20:15,380 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:20:15,380 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:20:15,380 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:20:15,380 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:20:15,381 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:20:15,381 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:20:15,381 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:20:15,381 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:20:15,381 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:20:15,382 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:20:15,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:20:15,382 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:20:15,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:20:15,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:20:15,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:20:15,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:20:15,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:20:15,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:20:15,384 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:20:15,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:20:15,384 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:20:15,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:20:15,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:20:15,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:20:15,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:20:15,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:20:15,385 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:20:15,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:20:15,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:20:15,386 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:20:15,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:20:15,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:20:15,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:20:15,387 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_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 376367d14f0ef5deff3321a7267050cf9f2383eb99d0a19dad6a556c0772ff28 [2022-12-14 15:20:15,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:20:15,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:20:15,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:20:15,595 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:20:15,596 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:20:15,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2022-12-14 15:20:18,140 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:20:18,282 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:20:18,282 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2022-12-14 15:20:18,287 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/data/b8813f0b4/3417f57d78b14fcfb3efea1bcc5c071f/FLAGf6a32eac1 [2022-12-14 15:20:18,298 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/data/b8813f0b4/3417f57d78b14fcfb3efea1bcc5c071f [2022-12-14 15:20:18,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:20:18,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:20:18,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:20:18,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:20:18,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:20:18,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7480ecfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18, skipping insertion in model container [2022-12-14 15:20:18,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:20:18,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:20:18,424 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_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2022-12-14 15:20:18,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:20:18,450 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:20:18,459 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_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2022-12-14 15:20:18,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:20:18,478 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:20:18,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18 WrapperNode [2022-12-14 15:20:18,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:20:18,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:20:18,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:20:18,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:20:18,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,506 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-12-14 15:20:18,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:20:18,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:20:18,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:20:18,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:20:18,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,520 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:20:18,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:20:18,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:20:18,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:20:18,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (1/1) ... [2022-12-14 15:20:18,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:20:18,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:20:18,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:20:18,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:20:18,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:20:18,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:20:18,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:20:18,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:20:18,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 15:20:18,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 15:20:18,625 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:20:18,626 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:20:18,776 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:20:18,805 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:20:18,805 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 15:20:18,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:20:18 BoogieIcfgContainer [2022-12-14 15:20:18,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:20:18,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:20:18,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:20:18,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:20:18,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:20:18" (1/3) ... [2022-12-14 15:20:18,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373f48e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:20:18, skipping insertion in model container [2022-12-14 15:20:18,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:20:18" (2/3) ... [2022-12-14 15:20:18,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373f48e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:20:18, skipping insertion in model container [2022-12-14 15:20:18,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:20:18" (3/3) ... [2022-12-14 15:20:18,813 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound100.c [2022-12-14 15:20:18,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:20:18,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:20:18,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:20:18,865 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;@391b78cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:20:18,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:20:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 15:20:18,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 15:20:18,873 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:20:18,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:20:18,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:20:18,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:20:18,879 INFO L85 PathProgramCache]: Analyzing trace with hash -678335095, now seen corresponding path program 1 times [2022-12-14 15:20:18,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:20:18,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879896006] [2022-12-14 15:20:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:18,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:20:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:18,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:20:18,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879896006] [2022-12-14 15:20:18,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 15:20:18,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918896943] [2022-12-14 15:20:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:18,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:18,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:20:18,973 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:20:18,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:20:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:19,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 15:20:19,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:20:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:20:19,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:20:19,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918896943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:20:19,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:20:19,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:20:19,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701115752] [2022-12-14 15:20:19,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:20:19,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 15:20:19,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:20:19,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 15:20:19,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 15:20:19,083 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:20:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:20:19,111 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2022-12-14 15:20:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 15:20:19,113 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 15:20:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:20:19,119 INFO L225 Difference]: With dead ends: 44 [2022-12-14 15:20:19,119 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 15:20:19,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 15:20:19,124 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:20:19,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:20:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 15:20:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 15:20:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 15:20:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2022-12-14 15:20:19,152 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2022-12-14 15:20:19,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:20:19,152 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2022-12-14 15:20:19,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:20:19,152 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2022-12-14 15:20:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 15:20:19,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:20:19,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:20:19,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:20:19,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:19,356 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:20:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:20:19,359 INFO L85 PathProgramCache]: Analyzing trace with hash 520368722, now seen corresponding path program 1 times [2022-12-14 15:20:19,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:20:19,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348626470] [2022-12-14 15:20:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:19,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:20:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:19,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:20:19,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348626470] [2022-12-14 15:20:19,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 15:20:19,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790560065] [2022-12-14 15:20:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:19,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:19,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:20:19,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:20:19,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:20:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:19,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:20:19,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:20:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:20:19,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:20:19,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790560065] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:20:19,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:20:19,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:20:19,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771185729] [2022-12-14 15:20:19,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:20:19,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:20:19,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:20:19,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:20:19,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:20:19,623 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:20:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:20:19,655 INFO L93 Difference]: Finished difference Result 42 states and 63 transitions. [2022-12-14 15:20:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:20:19,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 15:20:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:20:19,656 INFO L225 Difference]: With dead ends: 42 [2022-12-14 15:20:19,656 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 15:20:19,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:20:19,658 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:20:19,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:20:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 15:20:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-14 15:20:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 15:20:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2022-12-14 15:20:19,665 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 9 [2022-12-14 15:20:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:20:19,666 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2022-12-14 15:20:19,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:20:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2022-12-14 15:20:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 15:20:19,666 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:20:19,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:20:19,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 15:20:19,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:19,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:20:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:20:19,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1389535714, now seen corresponding path program 1 times [2022-12-14 15:20:19,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:20:19,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769825294] [2022-12-14 15:20:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:19,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:20:19,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:20:19,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159166586] [2022-12-14 15:20:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:19,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:19,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:20:19,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:20:19,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:20:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:19,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:20:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:20:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:20:20,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:20:20,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:20:20,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769825294] [2022-12-14 15:20:20,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:20:20,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159166586] [2022-12-14 15:20:20,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159166586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:20:20,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:20:20,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:20:20,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933431960] [2022-12-14 15:20:20,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:20:20,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:20:20,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:20:20,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:20:20,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:20:20,006 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:20:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:20:20,030 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2022-12-14 15:20:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:20:20,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 15:20:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:20:20,031 INFO L225 Difference]: With dead ends: 37 [2022-12-14 15:20:20,031 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 15:20:20,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:20:20,032 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:20:20,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:20:20,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 15:20:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-12-14 15:20:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 15:20:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2022-12-14 15:20:20,037 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 10 [2022-12-14 15:20:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:20:20,037 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2022-12-14 15:20:20,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:20:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2022-12-14 15:20:20,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 15:20:20,037 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:20:20,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:20:20,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:20:20,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:20,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:20:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:20:20,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1388046164, now seen corresponding path program 1 times [2022-12-14 15:20:20,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:20:20,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966450814] [2022-12-14 15:20:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:20,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:20:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:20:20,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:20:20,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966450814] [2022-12-14 15:20:20,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966450814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:20:20,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:20:20,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:20:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294966381] [2022-12-14 15:20:20,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:20:20,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:20:20,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:20:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:20:20,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:20:20,585 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:20:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:20:21,713 INFO L93 Difference]: Finished difference Result 59 states and 89 transitions. [2022-12-14 15:20:21,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:20:21,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 15:20:21,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:20:21,714 INFO L225 Difference]: With dead ends: 59 [2022-12-14 15:20:21,715 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 15:20:21,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:20:21,716 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:20:21,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 107 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 15:20:21,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 15:20:21,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-14 15:20:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 15:20:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2022-12-14 15:20:21,725 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 10 [2022-12-14 15:20:21,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:20:21,726 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2022-12-14 15:20:21,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:20:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2022-12-14 15:20:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 15:20:21,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:20:21,726 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:20:21,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:20:21,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:20:21,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:20:21,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1970023331, now seen corresponding path program 1 times [2022-12-14 15:20:21,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:20:21,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126115595] [2022-12-14 15:20:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:21,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:20:21,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:20:21,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467393431] [2022-12-14 15:20:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:21,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:21,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:20:21,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:20:21,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:20:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:21,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:20:21,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:20:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:20:21,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:20:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:20:21,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:20:21,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126115595] [2022-12-14 15:20:21,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:20:21,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467393431] [2022-12-14 15:20:21,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467393431] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:20:21,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777650078] [2022-12-14 15:20:21,832 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:20:21,832 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:20:21,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:20:21,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:20:21,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:20:22,028 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2022-12-14 15:20:22,032 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:20:22,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [777650078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:20:22,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:20:22,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 15 [2022-12-14 15:20:22,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132649469] [2022-12-14 15:20:22,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:20:22,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:20:22,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:20:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:20:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:20:22,281 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-12-14 15:20:22,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:20:22,917 INFO L93 Difference]: Finished difference Result 78 states and 117 transitions. [2022-12-14 15:20:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:20:22,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 15:20:22,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:20:22,919 INFO L225 Difference]: With dead ends: 78 [2022-12-14 15:20:22,919 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 15:20:22,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:20:22,921 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:20:22,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 86 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:20:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 15:20:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2022-12-14 15:20:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 15:20:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-12-14 15:20:22,939 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 12 [2022-12-14 15:20:22,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:20:22,939 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-12-14 15:20:22,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-12-14 15:20:22,939 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-12-14 15:20:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 15:20:22,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:20:22,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:20:22,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:20:23,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:23,142 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:20:23,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:20:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash 600084205, now seen corresponding path program 1 times [2022-12-14 15:20:23,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:20:23,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47277126] [2022-12-14 15:20:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:23,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:20:23,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:20:23,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220369235] [2022-12-14 15:20:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:23,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:23,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:20:23,152 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:20:23,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:20:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:23,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:20:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:20:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:20:23,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:20:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:20:23,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:20:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47277126] [2022-12-14 15:20:23,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:20:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220369235] [2022-12-14 15:20:23,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220369235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:20:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [611708090] [2022-12-14 15:20:23,242 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:20:23,242 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:20:23,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:20:23,243 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:20:23,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:20:23,416 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2022-12-14 15:20:23,420 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:20:23,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [611708090] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:20:23,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:20:23,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 5] total 17 [2022-12-14 15:20:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896823200] [2022-12-14 15:20:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:20:23,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:20:23,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:20:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:20:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:20:23,720 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-12-14 15:20:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:20:25,524 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2022-12-14 15:20:25,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:20:25,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 15:20:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:20:25,525 INFO L225 Difference]: With dead ends: 68 [2022-12-14 15:20:25,525 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 15:20:25,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:20:25,526 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:20:25,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 121 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 15:20:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 15:20:25,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2022-12-14 15:20:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 15:20:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2022-12-14 15:20:25,541 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 13 [2022-12-14 15:20:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:20:25,542 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2022-12-14 15:20:25,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-12-14 15:20:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2022-12-14 15:20:25,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 15:20:25,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:20:25,543 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:20:25,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:20:25,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 15:20:25,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:20:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:20:25,746 INFO L85 PathProgramCache]: Analyzing trace with hash 601573755, now seen corresponding path program 1 times [2022-12-14 15:20:25,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:20:25,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447823802] [2022-12-14 15:20:25,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:25,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:20:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:20:25,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:20:25,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447823802] [2022-12-14 15:20:25,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447823802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:20:25,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794573224] [2022-12-14 15:20:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:25,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:25,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:20:25,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:20:25,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:20:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:25,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:20:25,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:20:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:20:26,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:20:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:20:26,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794573224] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:20:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [961981261] [2022-12-14 15:20:26,184 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:20:26,184 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:20:26,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:20:26,185 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:20:26,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:20:26,376 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2022-12-14 15:20:26,432 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:20:27,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1216#(and (<= 2 ~counter~0) (< ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:20:27,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:20:27,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:20:27,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-14 15:20:27,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417298625] [2022-12-14 15:20:27,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:20:27,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 15:20:27,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:20:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 15:20:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-12-14 15:20:27,025 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:20:29,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:20:31,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:20:33,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:20:37,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:20:41,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:20:42,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:20:46,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:20:51,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:20:53,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:20:55,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:20:58,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:21:00,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:21:02,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:21:04,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:21:06,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:21:09,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:21:11,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:21:16,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:21:16,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:16,183 INFO L93 Difference]: Finished difference Result 116 states and 177 transitions. [2022-12-14 15:21:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 15:21:16,184 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 15:21:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:16,185 INFO L225 Difference]: With dead ends: 116 [2022-12-14 15:21:16,185 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 15:21:16,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-12-14 15:21:16,186 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 55 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 122 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:16,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 298 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 398 Invalid, 17 Unknown, 0 Unchecked, 49.0s Time] [2022-12-14 15:21:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 15:21:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2022-12-14 15:21:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 29 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-12-14 15:21:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2022-12-14 15:21:16,199 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 13 [2022-12-14 15:21:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:16,199 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2022-12-14 15:21:16,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:21:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2022-12-14 15:21:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 15:21:16,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:16,200 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:16,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:21:16,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 15:21:16,401 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:16,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash -339513844, now seen corresponding path program 1 times [2022-12-14 15:21:16,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:16,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237148694] [2022-12-14 15:21:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:16,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:16,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:21:16,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754833970] [2022-12-14 15:21:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:16,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:16,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:16,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:16,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:21:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:16,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:21:16,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:21:16,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:21:20,591 WARN L859 $PredicateComparison]: unable to prove that (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) is different from true [2022-12-14 15:21:25,731 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~r~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 16 |ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~n~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) (not (= (mod (* |ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))))) is different from false [2022-12-14 15:21:25,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237148694] [2022-12-14 15:21:25,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:21:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754833970] [2022-12-14 15:21:25,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754833970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940456289] [2022-12-14 15:21:25,827 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 15:21:25,827 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:21:25,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:21:25,828 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:21:25,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:21:25,969 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2022-12-14 15:21:26,064 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:21:26,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1940456289] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:26,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:26,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2022-12-14 15:21:26,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359777890] [2022-12-14 15:21:26,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:26,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:21:26,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:26,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:21:26,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=217, Unknown=2, NotChecked=62, Total=342 [2022-12-14 15:21:26,858 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:21:28,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:28,141 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2022-12-14 15:21:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:21:28,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-12-14 15:21:28,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:28,143 INFO L225 Difference]: With dead ends: 74 [2022-12-14 15:21:28,144 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 15:21:28,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=61, Invalid=217, Unknown=2, NotChecked=62, Total=342 [2022-12-14 15:21:28,144 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:28,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 107 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 15:21:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 15:21:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-12-14 15:21:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-14 15:21:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 79 transitions. [2022-12-14 15:21:28,152 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 79 transitions. Word has length 20 [2022-12-14 15:21:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:28,152 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 79 transitions. [2022-12-14 15:21:28,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:21:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 79 transitions. [2022-12-14 15:21:28,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 15:21:28,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:28,153 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:28,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 15:21:28,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:28,355 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:28,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1744099301, now seen corresponding path program 1 times [2022-12-14 15:21:28,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:28,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952900349] [2022-12-14 15:21:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:28,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:28,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:21:28,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667385790] [2022-12-14 15:21:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:28,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:28,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:28,365 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:28,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:21:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:21:28,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:21:28,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:21:32,553 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~q~0#1| Int) (|ULTIMATE.start_main_~r~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) 4294967296) (mod (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) 4294967296))) (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 4294967280) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 12) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 16 |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1| 4294967284) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296) 0))) is different from false [2022-12-14 15:21:32,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:32,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952900349] [2022-12-14 15:21:32,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:21:32,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667385790] [2022-12-14 15:21:32,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667385790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:32,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492654174] [2022-12-14 15:21:32,881 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 15:21:32,881 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:21:32,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:21:32,881 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:21:32,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:21:33,541 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-12-14 15:21:33,546 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:21:39,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1919#(and (<= 2 ~counter~0) (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:21:39,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:21:39,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:39,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-12-14 15:21:39,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145988177] [2022-12-14 15:21:39,875 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 15:21:39,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:21:39,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:21:39,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=367, Unknown=3, NotChecked=40, Total=506 [2022-12-14 15:21:39,877 INFO L87 Difference]: Start difference. First operand 54 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:21:41,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:21:44,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:21:46,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:21:48,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:21:50,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:21:53,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:21:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:55,497 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2022-12-14 15:21:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:21:55,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-12-14 15:21:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:55,498 INFO L225 Difference]: With dead ends: 64 [2022-12-14 15:21:55,499 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 15:21:55,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=110, Invalid=443, Unknown=3, NotChecked=44, Total=600 [2022-12-14 15:21:55,500 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 11 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:55,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 57 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 128 Invalid, 6 Unknown, 0 Unchecked, 15.3s Time] [2022-12-14 15:21:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 15:21:55,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-12-14 15:21:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 22 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-14 15:21:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2022-12-14 15:21:55,513 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 23 [2022-12-14 15:21:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:55,514 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2022-12-14 15:21:55,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:21:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2022-12-14 15:21:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 15:21:55,515 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:55,515 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:55,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:21:55,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:55,717 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash -787687870, now seen corresponding path program 1 times [2022-12-14 15:21:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:55,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020236227] [2022-12-14 15:21:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:55,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:55,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:21:55,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829317741] [2022-12-14 15:21:55,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:55,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:55,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:55,752 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:55,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:21:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:55,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:21:55,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:21:55,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:21:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:21:55,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:55,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020236227] [2022-12-14 15:21:55,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:21:55,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829317741] [2022-12-14 15:21:55,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829317741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:21:55,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385198274] [2022-12-14 15:21:55,892 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 15:21:55,892 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:21:55,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:21:55,892 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:21:55,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:22:17,261 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2022-12-14 15:22:17,302 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:22:25,165 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:22:27,172 WARN L837 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |c_#NULL.offset| 0) (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0)) (= |c_#NULL.base| 0) (<= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0)) (not (= (ite (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) 1 0) 0)) (<= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |c_#StackHeapBarrier|) (<= 2 c_~counter~0) (<= c_~counter~0 101)) is different from false [2022-12-14 15:23:00,056 WARN L233 SmtUtils]: Spent 19.58s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:23:36,505 WARN L233 SmtUtils]: Spent 23.09s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:23:38,510 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (and (not (= (ite (= (mod (+ .cse0 .cse1 (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0)) (<= |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |c_#NULL.offset| 0) (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0)) (= |c_#NULL.base| 0) (<= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (not (= (ite (= (mod (+ .cse0 .cse1) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0)) (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0)) (not (= (ite (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) 1 0) 0)) (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967288 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 4) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0)) (<= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |c_#StackHeapBarrier|) (<= 2 c_~counter~0) (<= c_~counter~0 101))) is different from false [2022-12-14 15:23:38,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2409#(and (<= 2 ~counter~0) (<= 0 |#NULL.base|) (<= ~counter~0 102) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 15:23:38,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:23:38,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:23:38,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-12-14 15:23:38,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970486248] [2022-12-14 15:23:38,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 15:23:38,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:23:38,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:23:38,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:23:38,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=577, Unknown=13, NotChecked=102, Total=812 [2022-12-14 15:23:38,556 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 15:23:40,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:23:47,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:23:50,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:23:55,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:23:57,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:23:57,323 INFO L93 Difference]: Finished difference Result 255 states and 327 transitions. [2022-12-14 15:23:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:23:57,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 46 [2022-12-14 15:23:57,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:23:57,325 INFO L225 Difference]: With dead ends: 255 [2022-12-14 15:23:57,325 INFO L226 Difference]: Without dead ends: 246 [2022-12-14 15:23:57,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 81.3s TimeCoverageRelationStatistics Valid=162, Invalid=825, Unknown=13, NotChecked=122, Total=1122 [2022-12-14 15:23:57,326 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 116 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:23:57,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 248 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 170 Invalid, 2 Unknown, 0 Unchecked, 18.7s Time] [2022-12-14 15:23:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-12-14 15:23:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 232. [2022-12-14 15:23:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 132 states have internal predecessors, (144), 81 states have call successors, (81), 23 states have call predecessors, (81), 23 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-12-14 15:23:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 301 transitions. [2022-12-14 15:23:57,350 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 301 transitions. Word has length 46 [2022-12-14 15:23:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:23:57,350 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 301 transitions. [2022-12-14 15:23:57,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 15:23:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 301 transitions. [2022-12-14 15:23:57,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 15:23:57,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:23:57,352 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:23:57,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:23:57,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 15:23:57,552 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:23:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:23:57,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1687602719, now seen corresponding path program 1 times [2022-12-14 15:23:57,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:23:57,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660066767] [2022-12-14 15:23:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:23:57,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:23:57,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:23:57,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522652559] [2022-12-14 15:23:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:23:57,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:23:57,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:23:57,561 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:23:57,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:23:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:23:57,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 15:23:57,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:23:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 23 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 15:23:57,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:18,598 WARN L233 SmtUtils]: Spent 9.66s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:24:18,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:24:18,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660066767] [2022-12-14 15:24:18,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:24:18,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522652559] [2022-12-14 15:24:18,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522652559] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:24:18,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186303408] [2022-12-14 15:24:18,601 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 15:24:18,601 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:24:18,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:24:18,602 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:24:18,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:24:41,978 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-12-14 15:24:41,982 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:25:03,641 WARN L233 SmtUtils]: Spent 12.72s on a formula simplification. DAG size of input: 51 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:26:15,557 WARN L233 SmtUtils]: Spent 48.08s on a formula simplification. DAG size of input: 71 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:27:43,018 WARN L233 SmtUtils]: Spent 59.45s on a formula simplification. DAG size of input: 88 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:29:34,164 WARN L233 SmtUtils]: Spent 1.25m on a formula simplification. DAG size of input: 100 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:29:59,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3375#(and (<= 2 ~counter~0) (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:29:59,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:29:59,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:29:59,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-12-14 15:29:59,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625178889] [2022-12-14 15:29:59,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:59,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:29:59,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:29:59,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=772, Unknown=40, NotChecked=0, Total=930 [2022-12-14 15:29:59,998 INFO L87 Difference]: Start difference. First operand 232 states and 301 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 15:30:05,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:30:08,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:30:10,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:30:11,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:30:13,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:30:15,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:30:17,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 15:30:20,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:30:21,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:30:24,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:30:31,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 15:30:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:31,726 INFO L93 Difference]: Finished difference Result 262 states and 337 transitions. [2022-12-14 15:30:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:30:31,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2022-12-14 15:30:31,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:31,729 INFO L225 Difference]: With dead ends: 262 [2022-12-14 15:30:31,729 INFO L226 Difference]: Without dead ends: 253 [2022-12-14 15:30:31,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 339.9s TimeCoverageRelationStatistics Valid=132, Invalid=883, Unknown=41, NotChecked=0, Total=1056 [2022-12-14 15:30:31,730 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 21 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:31,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 159 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 473 Invalid, 8 Unknown, 0 Unchecked, 29.7s Time] [2022-12-14 15:30:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-12-14 15:30:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2022-12-14 15:30:31,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 138 states have (on average 1.1231884057971016) internal successors, (155), 144 states have internal predecessors, (155), 87 states have call successors, (87), 26 states have call predecessors, (87), 26 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2022-12-14 15:30:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 324 transitions. [2022-12-14 15:30:31,752 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 324 transitions. Word has length 49 [2022-12-14 15:30:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:31,752 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 324 transitions. [2022-12-14 15:30:31,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 15:30:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 324 transitions. [2022-12-14 15:30:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 15:30:31,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:31,754 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:31,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:30:31,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 15:30:31,956 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:31,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1629435887, now seen corresponding path program 2 times [2022-12-14 15:30:31,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:31,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657900818] [2022-12-14 15:30:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:31,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:31,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:30:31,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351977357] [2022-12-14 15:30:31,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:30:31,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:30:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:30:31,981 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:30:31,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ca999-9cf2-4f65-a363-c4c3aee6e7f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:30:32,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:30:32,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:30:32,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 15:30:32,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:30:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 15:30:32,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:30:59,954 WARN L233 SmtUtils]: Spent 16.91s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:32:25,180 WARN L233 SmtUtils]: Spent 19.47s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:33:28,340 WARN L233 SmtUtils]: Spent 24.06s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:33:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 3 refuted. 4 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 15:33:58,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:33:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657900818] [2022-12-14 15:33:58,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:33:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351977357] [2022-12-14 15:33:58,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351977357] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:33:58,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [320944555] [2022-12-14 15:33:58,939 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 15:33:58,939 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:33:58,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:33:58,939 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:33:58,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:34:27,183 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-12-14 15:34:27,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:34:44,448 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (<= |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1)) (.cse1 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|)) (.cse2 (<= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse3 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|)) (.cse4 (<= 0 |c_#StackHeapBarrier|)) (.cse9 (<= 2 c_~counter~0)) (.cse10 (<= c_~counter~0 101))) (and .cse0 .cse1 (<= 0 |c_#NULL.base|) .cse2 .cse3 (<= 0 |c_#NULL.offset|) .cse4 (<= |c_#NULL.base| 0) (let ((.cse5 (= |c_#NULL.offset| 0)) (.cse6 (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse7 (= |c_#NULL.base| 0)) (.cse8 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0)))) (or (and .cse0 .cse1 (= |c_ULTIMATE.start_main_~p~0#1| 0) .cse5 .cse6 .cse7 .cse2 .cse8 .cse3 .cse4 .cse9 .cse10) (and .cse0 .cse1 .cse5 .cse6 .cse7 .cse2 .cse8 .cse3 .cse4 .cse9 .cse10))) (<= |c_#NULL.offset| 0) .cse9 .cse10)) is different from false