./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba --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 b879e9957df47aa9212d1bcb19c90b87b865d954f1a44f3c044747ce0553d2eb --- 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-b5237d8 [2022-11-22 00:08:32,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:08:32,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:08:32,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:08:32,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:08:32,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:08:32,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:08:32,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:08:32,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:08:32,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:08:32,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:08:32,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:08:32,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:08:32,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:08:32,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:08:32,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:08:32,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:08:32,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:08:32,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:08:32,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:08:32,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:08:32,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:08:32,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:08:32,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:08:32,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:08:32,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:08:32,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:08:32,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:08:32,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:08:32,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:08:32,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:08:32,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:08:32,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:08:32,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:08:32,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:08:32,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:08:32,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:08:32,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:08:32,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:08:32,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:08:32,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:08:32,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:08:32,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:08:32,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:08:32,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:08:32,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:08:32,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:08:32,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:08:32,460 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:08:32,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:08:32,460 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:08:32,460 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:08:32,460 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:08:32,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:08:32,461 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:08:32,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:08:32,461 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:08:32,461 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:08:32,462 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:08:32,462 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:08:32,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:08:32,463 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:08:32,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:08:32,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:08:32,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:08:32,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:08:32,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:08:32,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:08:32,464 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:08:32,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:08:32,465 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:08:32,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:08:32,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:08:32,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:08:32,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:08:32,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:08:32,466 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:08:32,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:08:32,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:08:32,467 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:08:32,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:08:32,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:08:32,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:08:32,468 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_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b879e9957df47aa9212d1bcb19c90b87b865d954f1a44f3c044747ce0553d2eb [2022-11-22 00:08:32,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:08:32,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:08:32,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:08:32,760 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:08:32,761 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:08:32,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i [2022-11-22 00:08:35,883 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:08:36,058 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:08:36,059 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i [2022-11-22 00:08:36,065 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/data/66b6ebd53/c0fd73d22f4a49478d914a9ca6b4f0b9/FLAGf4e3df406 [2022-11-22 00:08:36,083 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/data/66b6ebd53/c0fd73d22f4a49478d914a9ca6b4f0b9 [2022-11-22 00:08:36,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:08:36,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:08:36,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:08:36,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:08:36,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:08:36,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1047de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36, skipping insertion in model container [2022-11-22 00:08:36,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:08:36,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:08:36,266 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_01f21157-1627-4a87-9996-e46f095b3b2d/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i[950,963] [2022-11-22 00:08:36,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:08:36,292 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:08:36,302 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_01f21157-1627-4a87-9996-e46f095b3b2d/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound10.i[950,963] [2022-11-22 00:08:36,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:08:36,322 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:08:36,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36 WrapperNode [2022-11-22 00:08:36,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:08:36,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:08:36,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:08:36,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:08:36,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,352 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-11-22 00:08:36,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:08:36,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:08:36,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:08:36,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:08:36,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,371 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:08:36,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:08:36,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:08:36,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:08:36,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (1/1) ... [2022-11-22 00:08:36,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:08:36,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:36,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:08:36,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:08:36,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:08:36,451 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 00:08:36,451 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 00:08:36,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:08:36,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:08:36,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:08:36,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 00:08:36,453 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 00:08:36,539 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:08:36,541 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:08:36,789 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:08:36,850 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:08:36,857 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 00:08:36,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:08:36 BoogieIcfgContainer [2022-11-22 00:08:36,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:08:36,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:08:36,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:08:36,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:08:36,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:08:36" (1/3) ... [2022-11-22 00:08:36,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5f2221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:08:36, skipping insertion in model container [2022-11-22 00:08:36,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:08:36" (2/3) ... [2022-11-22 00:08:36,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5f2221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:08:36, skipping insertion in model container [2022-11-22 00:08:36,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:08:36" (3/3) ... [2022-11-22 00:08:36,872 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound10.i [2022-11-22 00:08:36,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:08:36,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:08:36,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:08:36,967 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;@57264d2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:08:36,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:08:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 00:08:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 00:08:36,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:36,984 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:08:36,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:08:36,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1734137638, now seen corresponding path program 1 times [2022-11-22 00:08:37,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:37,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680208630] [2022-11-22 00:08:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:37,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:37,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:37,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680208630] [2022-11-22 00:08:37,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-22 00:08:37,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594470413] [2022-11-22 00:08:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:37,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:37,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:37,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:37,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:08:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:37,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-22 00:08:37,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:08:37,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:08:37,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594470413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:08:37,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:08:37,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:08:37,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48635664] [2022-11-22 00:08:37,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:08:37,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 00:08:37,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:37,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 00:08:37,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 00:08:37,365 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 00:08:37,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:37,395 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-11-22 00:08:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 00:08:37,398 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 14 [2022-11-22 00:08:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:37,406 INFO L225 Difference]: With dead ends: 35 [2022-11-22 00:08:37,406 INFO L226 Difference]: Without dead ends: 20 [2022-11-22 00:08:37,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 00:08:37,413 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:37,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:08:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-22 00:08:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-22 00:08:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:08:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-22 00:08:37,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2022-11-22 00:08:37,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:37,464 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-22 00:08:37,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 00:08:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-22 00:08:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 00:08:37,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:37,468 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:08:37,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:37,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 00:08:37,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:08:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:37,673 INFO L85 PathProgramCache]: Analyzing trace with hash -207211284, now seen corresponding path program 1 times [2022-11-22 00:08:37,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:37,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099053647] [2022-11-22 00:08:37,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:37,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:37,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:37,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099053647] [2022-11-22 00:08:37,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-22 00:08:37,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629082609] [2022-11-22 00:08:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:37,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:37,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:37,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:37,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:08:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:37,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:08:37,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:08:37,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:08:37,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629082609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:08:37,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:08:37,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:08:37,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406401536] [2022-11-22 00:08:37,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:08:37,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:08:37,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:37,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:08:37,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:08:37,930 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 00:08:37,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:37,958 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-22 00:08:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:08:37,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 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 16 [2022-11-22 00:08:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:37,959 INFO L225 Difference]: With dead ends: 33 [2022-11-22 00:08:37,959 INFO L226 Difference]: Without dead ends: 22 [2022-11-22 00:08:37,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:08:37,961 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:37,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:08:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-22 00:08:37,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-22 00:08:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:08:37,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-22 00:08:37,972 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2022-11-22 00:08:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:37,974 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-22 00:08:37,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 00:08:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-22 00:08:37,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 00:08:37,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:37,977 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:08:37,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:38,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:38,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:08:38,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:38,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1776102932, now seen corresponding path program 1 times [2022-11-22 00:08:38,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:38,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017102301] [2022-11-22 00:08:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:38,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:38,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:08:38,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35488230] [2022-11-22 00:08:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:38,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:38,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:38,225 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:38,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:08:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:38,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 00:08:38,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:08:38,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:08:38,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:38,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017102301] [2022-11-22 00:08:38,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:08:38,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35488230] [2022-11-22 00:08:38,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35488230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:08:38,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:08:38,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-22 00:08:38,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17414578] [2022-11-22 00:08:38,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:08:38,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:08:38,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:38,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:08:38,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:08:38,582 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 00:08:38,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:38,792 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-11-22 00:08:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:08:38,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-22 00:08:38,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:38,795 INFO L225 Difference]: With dead ends: 34 [2022-11-22 00:08:38,795 INFO L226 Difference]: Without dead ends: 31 [2022-11-22 00:08:38,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:08:38,797 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:38,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 74 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:08:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-22 00:08:38,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-22 00:08:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 00:08:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-22 00:08:38,807 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2022-11-22 00:08:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:38,807 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-22 00:08:38,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 00:08:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-22 00:08:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 00:08:38,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:38,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:08:38,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 00:08:39,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:39,015 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:08:39,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:39,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1737998361, now seen corresponding path program 1 times [2022-11-22 00:08:39,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:39,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123530529] [2022-11-22 00:08:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:39,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:39,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:08:39,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511866384] [2022-11-22 00:08:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:39,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:39,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:39,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:39,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:08:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:39,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 00:08:39,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:08:39,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:08:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:08:39,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:39,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123530529] [2022-11-22 00:08:39,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:08:39,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511866384] [2022-11-22 00:08:39,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511866384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:08:39,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [438320308] [2022-11-22 00:08:39,210 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 00:08:39,211 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:08:39,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:08:39,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:08:39,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:08:39,827 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2022-11-22 00:08:39,854 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-22 00:08:39,896 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:08:41,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '538#(and (<= 2 ~counter~0) (< ~counter~0 11) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:08:41,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:08:41,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:08:41,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-22 00:08:41,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887457890] [2022-11-22 00:08:41,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:08:41,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:08:41,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:08:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:08:41,153 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:08:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:41,276 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-11-22 00:08:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 00:08:41,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2022-11-22 00:08:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:41,279 INFO L225 Difference]: With dead ends: 62 [2022-11-22 00:08:41,279 INFO L226 Difference]: Without dead ends: 51 [2022-11-22 00:08:41,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:08:41,281 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:41,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 95 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:08:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-22 00:08:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-11-22 00:08:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 00:08:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-22 00:08:41,298 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 19 [2022-11-22 00:08:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:41,299 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-22 00:08:41,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:08:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-22 00:08:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 00:08:41,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:41,302 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:08:41,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:41,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:41,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:08:41,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:41,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1948059783, now seen corresponding path program 1 times [2022-11-22 00:08:41,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:41,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634762729] [2022-11-22 00:08:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:41,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:41,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:08:41,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804637704] [2022-11-22 00:08:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:41,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:41,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:41,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:41,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:08:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 00:08:41,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:08:41,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:08:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:08:42,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:42,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634762729] [2022-11-22 00:08:42,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:08:42,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804637704] [2022-11-22 00:08:42,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804637704] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:08:42,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:08:42,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-22 00:08:42,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156721036] [2022-11-22 00:08:42,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:08:42,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:08:42,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:08:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:08:42,011 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 00:08:44,100 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 [1] [2022-11-22 00:08:46,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-22 00:08:48,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-22 00:08:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:48,484 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-11-22 00:08:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:08:48,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 [2022-11-22 00:08:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:48,486 INFO L225 Difference]: With dead ends: 50 [2022-11-22 00:08:48,486 INFO L226 Difference]: Without dead ends: 48 [2022-11-22 00:08:48,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:08:48,487 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:48,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 72 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 3 Unknown, 0 Unchecked, 6.4s Time] [2022-11-22 00:08:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-22 00:08:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-11-22 00:08:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 37 states have internal predecessors, (44), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 00:08:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-22 00:08:48,506 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 20 [2022-11-22 00:08:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:48,507 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-22 00:08:48,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 00:08:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-22 00:08:48,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 00:08:48,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:48,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:08:48,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:48,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:48,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:08:48,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:48,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1946272323, now seen corresponding path program 1 times [2022-11-22 00:08:48,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:48,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538056499] [2022-11-22 00:08:48,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:48,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:48,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:08:48,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040038788] [2022-11-22 00:08:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:48,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:48,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:48,760 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:48,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:08:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 00:08:48,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:08:48,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:08:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:08:48,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:48,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538056499] [2022-11-22 00:08:48,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:08:48,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040038788] [2022-11-22 00:08:48,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040038788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:08:48,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1303154672] [2022-11-22 00:08:48,936 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 00:08:48,936 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:08:48,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:08:48,938 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:08:48,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:08:49,261 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-22 00:08:49,285 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-22 00:08:49,310 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:08:50,428 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1082#(and (<= 11 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:08:50,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:08:50,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:08:50,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-22 00:08:50,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78712081] [2022-11-22 00:08:50,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:08:50,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 00:08:50,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:50,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 00:08:50,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:08:50,431 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:08:50,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:50,644 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2022-11-22 00:08:50,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 00:08:50,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-22 00:08:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:50,651 INFO L225 Difference]: With dead ends: 116 [2022-11-22 00:08:50,652 INFO L226 Difference]: Without dead ends: 109 [2022-11-22 00:08:50,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-11-22 00:08:50,654 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:50,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 124 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:08:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-22 00:08:50,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2022-11-22 00:08:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.236842105263158) internal successors, (94), 84 states have internal predecessors, (94), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 00:08:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2022-11-22 00:08:50,689 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 20 [2022-11-22 00:08:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:50,689 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2022-11-22 00:08:50,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:08:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2022-11-22 00:08:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 00:08:50,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:50,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:08:50,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:50,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 00:08:50,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:08:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:50,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1825805005, now seen corresponding path program 1 times [2022-11-22 00:08:50,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:50,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049203785] [2022-11-22 00:08:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:50,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:50,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:08:50,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165368870] [2022-11-22 00:08:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:50,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:50,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:50,925 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:50,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:08:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:50,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:08:50,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:08:51,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:08:51,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:51,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049203785] [2022-11-22 00:08:51,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:08:51,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165368870] [2022-11-22 00:08:51,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165368870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:08:51,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:08:51,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:08:51,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634973872] [2022-11-22 00:08:51,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:08:51,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:08:51,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:51,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:08:51,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:08:51,011 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 00:08:51,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:51,052 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2022-11-22 00:08:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:08:51,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-22 00:08:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:51,053 INFO L225 Difference]: With dead ends: 139 [2022-11-22 00:08:51,054 INFO L226 Difference]: Without dead ends: 89 [2022-11-22 00:08:51,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:08:51,055 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:51,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:08:51,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-22 00:08:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-22 00:08:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 73 states have internal predecessors, (83), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:08:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-11-22 00:08:51,076 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 25 [2022-11-22 00:08:51,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:51,077 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-11-22 00:08:51,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 00:08:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-11-22 00:08:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 00:08:51,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:51,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:08:51,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-22 00:08:51,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 00:08:51,284 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:08:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash -687200305, now seen corresponding path program 1 times [2022-11-22 00:08:51,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:51,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431651473] [2022-11-22 00:08:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:51,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:51,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:08:51,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267218512] [2022-11-22 00:08:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:51,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:51,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:51,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:51,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:08:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:51,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 00:08:51,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:08:51,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:08:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:08:51,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:51,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431651473] [2022-11-22 00:08:51,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:08:51,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267218512] [2022-11-22 00:08:51,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267218512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:08:51,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987820239] [2022-11-22 00:08:51,526 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 00:08:51,526 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:08:51,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:08:51,527 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:08:51,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:08:51,819 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2022-11-22 00:08:51,911 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-22 00:08:51,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:08:53,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1965#(and (<= 2 ~counter~0) (< ~counter~0 11) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:08:53,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:08:53,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:08:53,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-22 00:08:53,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075241615] [2022-11-22 00:08:53,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:08:53,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:08:53,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:53,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:08:53,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-11-22 00:08:53,227 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 00:08:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:53,386 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2022-11-22 00:08:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:08:53,387 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-11-22 00:08:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:53,390 INFO L225 Difference]: With dead ends: 104 [2022-11-22 00:08:53,390 INFO L226 Difference]: Without dead ends: 84 [2022-11-22 00:08:53,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-11-22 00:08:53,392 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:53,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 86 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:08:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-22 00:08:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-22 00:08:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 69 states have internal predecessors, (77), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:08:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2022-11-22 00:08:53,413 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 26 [2022-11-22 00:08:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:53,414 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2022-11-22 00:08:53,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 00:08:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2022-11-22 00:08:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 00:08:53,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:53,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:08:53,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:53,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:53,620 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:08:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:53,621 INFO L85 PathProgramCache]: Analyzing trace with hash -810539866, now seen corresponding path program 1 times [2022-11-22 00:08:53,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:53,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219943605] [2022-11-22 00:08:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:53,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:53,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:08:53,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402423561] [2022-11-22 00:08:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:53,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:53,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:53,651 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:53,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:08:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:54,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 00:08:54,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:08:54,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:09:21,167 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (or (let ((.cse3 (* (* (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648) |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse0 4294967296) 4294967296))) (and (< .cse0 (+ .cse1 .cse2 1)) (< (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse1)) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))))) is different from true [2022-11-22 00:09:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 3 not checked. [2022-11-22 00:09:41,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:09:41,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219943605] [2022-11-22 00:09:41,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:09:41,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402423561] [2022-11-22 00:09:41,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402423561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:09:41,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [668277077] [2022-11-22 00:09:41,727 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-22 00:09:41,727 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:09:41,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:09:41,728 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:09:41,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:09:42,743 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2022-11-22 00:09:42,771 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-22 00:09:42,795 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:09:46,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2427#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:09:46,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:09:46,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:09:46,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-11-22 00:09:46,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655682261] [2022-11-22 00:09:46,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:09:46,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 00:09:46,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:09:46,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 00:09:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=880, Unknown=1, NotChecked=60, Total=1056 [2022-11-22 00:09:46,955 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-22 00:09:51,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:09:53,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:09:56,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:10:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:00,561 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2022-11-22 00:10:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 00:10:00,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-11-22 00:10:00,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:00,562 INFO L225 Difference]: With dead ends: 94 [2022-11-22 00:10:00,562 INFO L226 Difference]: Without dead ends: 92 [2022-11-22 00:10:00,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=179, Invalid=1384, Unknown=1, NotChecked=76, Total=1640 [2022-11-22 00:10:00,564 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:00,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 154 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 218 Invalid, 2 Unknown, 40 Unchecked, 12.0s Time] [2022-11-22 00:10:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-22 00:10:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2022-11-22 00:10:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 69 states have internal predecessors, (77), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:10:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2022-11-22 00:10:00,583 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2022-11-22 00:10:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:00,583 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2022-11-22 00:10:00,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-22 00:10:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2022-11-22 00:10:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 00:10:00,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:00,585 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:10:00,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:10:00,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:00,791 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:10:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1953882091, now seen corresponding path program 1 times [2022-11-22 00:10:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:00,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408189794] [2022-11-22 00:10:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:00,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:10:00,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733428534] [2022-11-22 00:10:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:00,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:00,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:00,824 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:00,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:10:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:00,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 00:10:00,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:10:00,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:10:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:10:01,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408189794] [2022-11-22 00:10:01,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:10:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733428534] [2022-11-22 00:10:01,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733428534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:10:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784224454] [2022-11-22 00:10:01,075 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 00:10:01,075 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:10:01,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:10:01,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:10:01,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:10:01,287 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2022-11-22 00:10:01,298 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-22 00:10:01,317 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:10:01,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2901#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 12 ~counter~0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:10:01,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:10:01,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:10:01,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-11-22 00:10:01,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432724646] [2022-11-22 00:10:01,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:10:01,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 00:10:01,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:10:01,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 00:10:01,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2022-11-22 00:10:01,970 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:10:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:02,268 INFO L93 Difference]: Finished difference Result 190 states and 217 transitions. [2022-11-22 00:10:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 00:10:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-11-22 00:10:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:02,271 INFO L225 Difference]: With dead ends: 190 [2022-11-22 00:10:02,271 INFO L226 Difference]: Without dead ends: 170 [2022-11-22 00:10:02,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 00:10:02,272 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:02,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 141 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:10:02,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-22 00:10:02,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 99. [2022-11-22 00:10:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.175) internal successors, (94), 83 states have internal predecessors, (94), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:10:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2022-11-22 00:10:02,294 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 31 [2022-11-22 00:10:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:02,294 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2022-11-22 00:10:02,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 00:10:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2022-11-22 00:10:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 00:10:02,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:02,296 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:10:02,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:10:02,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 00:10:02,501 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:10:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:02,502 INFO L85 PathProgramCache]: Analyzing trace with hash -777460733, now seen corresponding path program 2 times [2022-11-22 00:10:02,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:02,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924832890] [2022-11-22 00:10:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:02,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:02,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:10:02,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759690829] [2022-11-22 00:10:02,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:10:02,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:02,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:02,538 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:02,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:10:02,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 00:10:02,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:10:02,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 00:10:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-22 00:10:02,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:10:02,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:02,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924832890] [2022-11-22 00:10:02,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:10:02,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759690829] [2022-11-22 00:10:02,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759690829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:10:02,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:10:02,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:10:02,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152970427] [2022-11-22 00:10:02,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:10:02,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:10:02,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:10:02,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:10:02,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:10:02,699 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 00:10:02,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:02,939 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2022-11-22 00:10:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:10:02,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 32 [2022-11-22 00:10:02,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:02,941 INFO L225 Difference]: With dead ends: 115 [2022-11-22 00:10:02,941 INFO L226 Difference]: Without dead ends: 108 [2022-11-22 00:10:02,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:10:02,943 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:02,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:10:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-22 00:10:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2022-11-22 00:10:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 81 states have internal predecessors, (91), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 00:10:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2022-11-22 00:10:02,963 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 32 [2022-11-22 00:10:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:02,963 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2022-11-22 00:10:02,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 00:10:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2022-11-22 00:10:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 00:10:02,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:02,965 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:10:02,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 00:10:03,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 00:10:03,170 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:10:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:03,171 INFO L85 PathProgramCache]: Analyzing trace with hash -641963642, now seen corresponding path program 2 times [2022-11-22 00:10:03,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:03,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994207981] [2022-11-22 00:10:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:03,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:03,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:10:03,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553399136] [2022-11-22 00:10:03,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:10:03,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:03,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:03,183 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:03,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:10:03,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 00:10:03,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:10:03,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 00:10:03,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 00:10:04,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:10:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:10:18,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994207981] [2022-11-22 00:10:18,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:10:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553399136] [2022-11-22 00:10:18,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553399136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:10:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [185429977] [2022-11-22 00:10:18,385 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-22 00:10:18,385 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:10:18,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:10:18,386 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:10:18,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:10:19,543 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-22 00:10:19,559 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-22 00:10:19,578 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:10:21,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3938#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:10:21,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:10:21,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:10:21,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2022-11-22 00:10:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543195111] [2022-11-22 00:10:21,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:10:21,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 00:10:21,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:10:21,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 00:10:21,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-11-22 00:10:21,738 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-22 00:10:25,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:25,827 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2022-11-22 00:10:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:10:25,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-11-22 00:10:25,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:25,830 INFO L225 Difference]: With dead ends: 125 [2022-11-22 00:10:25,831 INFO L226 Difference]: Without dead ends: 121 [2022-11-22 00:10:25,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-11-22 00:10:25,832 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:25,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 153 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-22 00:10:25,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-22 00:10:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2022-11-22 00:10:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 90 states have internal predecessors, (99), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 00:10:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2022-11-22 00:10:25,856 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 34 [2022-11-22 00:10:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:25,857 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2022-11-22 00:10:25,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-22 00:10:25,857 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2022-11-22 00:10:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 00:10:25,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:25,858 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:10:25,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:10:26,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:26,064 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:10:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1487974853, now seen corresponding path program 3 times [2022-11-22 00:10:26,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:26,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868827719] [2022-11-22 00:10:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:26,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:26,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:10:26,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740096829] [2022-11-22 00:10:26,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:10:26,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:26,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:26,075 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:26,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:10:26,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:10:26,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:10:26,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 00:10:26,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:10:26,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:10:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:10:27,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:27,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868827719] [2022-11-22 00:10:27,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:10:27,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740096829] [2022-11-22 00:10:27,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740096829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:10:27,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287658342] [2022-11-22 00:10:27,748 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-22 00:10:27,748 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:10:27,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:10:27,748 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:10:27,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:10:28,678 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2022-11-22 00:10:28,699 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-22 00:10:28,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:10:29,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4503#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:10:29,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:10:29,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:10:29,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-22 00:10:29,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514041541] [2022-11-22 00:10:29,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:10:29,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:10:29,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:10:29,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:10:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-11-22 00:10:29,807 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-22 00:10:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:30,421 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2022-11-22 00:10:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:10:30,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2022-11-22 00:10:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:30,423 INFO L225 Difference]: With dead ends: 122 [2022-11-22 00:10:30,423 INFO L226 Difference]: Without dead ends: 85 [2022-11-22 00:10:30,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-11-22 00:10:30,424 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 49 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:30,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 112 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:10:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-22 00:10:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-22 00:10:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 72 states have internal predecessors, (80), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 00:10:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2022-11-22 00:10:30,444 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 36 [2022-11-22 00:10:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:30,444 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2022-11-22 00:10:30,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-22 00:10:30,445 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2022-11-22 00:10:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 00:10:30,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:30,446 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:10:30,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-22 00:10:30,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 00:10:30,651 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:10:30,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:30,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1370364814, now seen corresponding path program 4 times [2022-11-22 00:10:30,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:30,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487506843] [2022-11-22 00:10:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:30,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:30,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:10:30,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241265614] [2022-11-22 00:10:30,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:10:30,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:30,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:30,663 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:30,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f21157-1627-4a87-9996-e46f095b3b2d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 00:10:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-22 00:10:36,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:11:13,504 WARN L233 SmtUtils]: Spent 17.25s on a formula simplification. DAG size of input: 107 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)