./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/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_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/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_a06d641e-2c16-4b89-a7f6-e56a28483c6d/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 c533ab673c7ac44f09cf312108422da4b4eb94a047fb46aaa19b12fad5dce8e7 --- 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 02:44:19,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:44:19,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:44:19,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:44:19,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:44:19,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:44:19,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:44:19,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:44:19,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:44:19,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:44:19,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:44:19,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:44:19,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:44:19,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:44:19,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:44:19,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:44:19,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:44:19,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:44:19,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:44:19,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:44:19,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:44:19,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:44:19,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:44:19,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:44:19,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:44:19,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:44:19,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:44:19,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:44:19,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:44:19,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:44:19,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:44:19,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:44:19,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:44:19,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:44:19,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:44:19,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:44:19,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:44:19,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:44:19,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:44:19,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:44:19,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:44:19,502 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:44:19,527 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:44:19,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:44:19,528 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:44:19,528 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:44:19,529 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:44:19,529 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:44:19,529 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:44:19,530 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:44:19,530 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:44:19,530 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:44:19,530 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:44:19,531 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:44:19,531 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:44:19,531 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:44:19,531 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:44:19,532 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:44:19,532 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:44:19,532 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:44:19,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:44:19,533 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:44:19,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:44:19,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:44:19,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:44:19,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:44:19,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:44:19,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:44:19,535 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:44:19,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:44:19,535 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:44:19,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:44:19,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:44:19,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:44:19,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:44:19,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:44:19,537 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:44:19,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:44:19,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:44:19,538 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:44:19,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:44:19,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:44:19,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:44:19,539 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_a06d641e-2c16-4b89-a7f6-e56a28483c6d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c533ab673c7ac44f09cf312108422da4b4eb94a047fb46aaa19b12fad5dce8e7 [2022-11-22 02:44:19,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:44:19,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:44:19,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:44:19,911 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:44:19,911 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:44:19,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i [2022-11-22 02:44:23,005 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:44:23,181 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:44:23,182 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i [2022-11-22 02:44:23,189 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/data/cc8525ec6/a677a0066aaa459ab3958ff22ffd68b0/FLAG62a02214d [2022-11-22 02:44:23,204 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/data/cc8525ec6/a677a0066aaa459ab3958ff22ffd68b0 [2022-11-22 02:44:23,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:44:23,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:44:23,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:44:23,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:44:23,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:44:23,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eb77ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23, skipping insertion in model container [2022-11-22 02:44:23,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:44:23,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:44:23,413 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_a06d641e-2c16-4b89-a7f6-e56a28483c6d/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i[951,964] [2022-11-22 02:44:23,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:44:23,438 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:44:23,452 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_a06d641e-2c16-4b89-a7f6-e56a28483c6d/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i[951,964] [2022-11-22 02:44:23,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:44:23,471 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:44:23,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23 WrapperNode [2022-11-22 02:44:23,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:44:23,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:44:23,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:44:23,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:44:23,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,512 INFO L138 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-11-22 02:44:23,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:44:23,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:44:23,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:44:23,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:44:23,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,533 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:44:23,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:44:23,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:44:23,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:44:23,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (1/1) ... [2022-11-22 02:44:23,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:44:23,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:23,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:44:23,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:44:23,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:44:23,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:44:23,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:44:23,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:44:23,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 02:44:23,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 02:44:23,687 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:44:23,689 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:44:23,841 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:44:23,964 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:44:23,964 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:44:23,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:44:23 BoogieIcfgContainer [2022-11-22 02:44:23,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:44:23,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:44:23,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:44:23,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:44:23,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:44:23" (1/3) ... [2022-11-22 02:44:23,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a181f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:44:23, skipping insertion in model container [2022-11-22 02:44:23,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:23" (2/3) ... [2022-11-22 02:44:23,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a181f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:44:23, skipping insertion in model container [2022-11-22 02:44:23,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:44:23" (3/3) ... [2022-11-22 02:44:23,989 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound20.i [2022-11-22 02:44:24,009 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:44:24,009 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:44:24,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:44:24,088 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;@6a979a6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:44:24,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:44:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:44:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:44:24,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:24,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:44:24,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1881233236, now seen corresponding path program 1 times [2022-11-22 02:44:24,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:24,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470472959] [2022-11-22 02:44:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:24,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:24,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:24,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470472959] [2022-11-22 02:44:24,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-22 02:44:24,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991131952] [2022-11-22 02:44:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:24,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:24,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:24,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:44:24,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:44:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:24,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-22 02:44:24,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:44:24,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:44:24,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991131952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:44:24,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:44:24,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:44:24,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068909942] [2022-11-22 02:44:24,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:44:24,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 02:44:24,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:24,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 02:44:24,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:44:24,599 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:44:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:24,666 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-11-22 02:44:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 02:44:24,670 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 02:44:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:24,681 INFO L225 Difference]: With dead ends: 27 [2022-11-22 02:44:24,682 INFO L226 Difference]: Without dead ends: 13 [2022-11-22 02:44:24,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:44:24,692 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:24,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:44:24,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-22 02:44:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-22 02:44:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:44:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-22 02:44:24,729 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-11-22 02:44:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:24,729 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-22 02:44:24,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:44:24,730 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-22 02:44:24,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:44:24,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:24,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:44:24,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 02:44:24,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 02:44:24,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:24,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:24,936 INFO L85 PathProgramCache]: Analyzing trace with hash -515868340, now seen corresponding path program 1 times [2022-11-22 02:44:24,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:24,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432030364] [2022-11-22 02:44:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:24,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:24,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:44:24,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639209832] [2022-11-22 02:44:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:24,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:24,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:24,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:44:24,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:44:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:25,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:44:25,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:44:25,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:44:25,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:25,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432030364] [2022-11-22 02:44:25,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:44:25,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639209832] [2022-11-22 02:44:25,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639209832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:44:25,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:44:25,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:44:25,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945888236] [2022-11-22 02:44:25,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:44:25,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:44:25,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:25,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:44:25,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:44:25,332 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:44:25,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:25,462 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-11-22 02:44:25,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:44:25,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 02:44:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:25,464 INFO L225 Difference]: With dead ends: 25 [2022-11-22 02:44:25,464 INFO L226 Difference]: Without dead ends: 22 [2022-11-22 02:44:25,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:44:25,466 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:25,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:44:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-22 02:44:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-22 02:44:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:44:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-22 02:44:25,476 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2022-11-22 02:44:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:25,476 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-22 02:44:25,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:44:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-22 02:44:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 02:44:25,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:25,478 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:44:25,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:44:25,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-22 02:44:25,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:25,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:25,685 INFO L85 PathProgramCache]: Analyzing trace with hash -965242393, now seen corresponding path program 1 times [2022-11-22 02:44:25,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:25,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027144817] [2022-11-22 02:44:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:25,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:25,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:44:25,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436666056] [2022-11-22 02:44:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:25,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:25,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:25,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:44:25,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:44:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:25,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:44:25,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:44:26,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:44:28,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:28,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027144817] [2022-11-22 02:44:28,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:44:28,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436666056] [2022-11-22 02:44:28,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436666056] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:44:28,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:44:28,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-11-22 02:44:28,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660605923] [2022-11-22 02:44:28,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:44:28,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:44:28,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:28,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:44:28,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2022-11-22 02:44:28,356 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:44:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:28,768 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-22 02:44:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:44:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 02:44:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:28,769 INFO L225 Difference]: With dead ends: 32 [2022-11-22 02:44:28,769 INFO L226 Difference]: Without dead ends: 29 [2022-11-22 02:44:28,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=28, Invalid=81, Unknown=1, NotChecked=0, Total=110 [2022-11-22 02:44:28,771 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:28,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 33 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:44:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-22 02:44:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-11-22 02:44:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:44:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-22 02:44:28,784 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2022-11-22 02:44:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:28,784 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-22 02:44:28,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:44:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-22 02:44:28,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:44:28,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:28,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:44:28,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:44:28,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:28,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash -969972797, now seen corresponding path program 1 times [2022-11-22 02:44:28,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:28,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729698831] [2022-11-22 02:44:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:28,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:29,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:44:29,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972095487] [2022-11-22 02:44:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:29,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:29,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:29,023 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:44:29,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:44:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:29,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:44:29,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:44:29,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:44:29,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:29,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729698831] [2022-11-22 02:44:29,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:44:29,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972095487] [2022-11-22 02:44:29,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972095487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:44:29,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:44:29,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:44:29,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82471008] [2022-11-22 02:44:29,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:44:29,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:44:29,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:29,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:44:29,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:44:29,144 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:44:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:29,175 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-11-22 02:44:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:44:29,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-22 02:44:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:29,177 INFO L225 Difference]: With dead ends: 35 [2022-11-22 02:44:29,177 INFO L226 Difference]: Without dead ends: 22 [2022-11-22 02:44:29,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 02:44:29,179 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:29,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:44:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-22 02:44:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-22 02:44:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:44:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-22 02:44:29,190 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-11-22 02:44:29,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:29,191 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-22 02:44:29,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:44:29,191 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-22 02:44:29,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 02:44:29,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:29,192 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:44:29,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 02:44:29,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:29,399 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash -425494840, now seen corresponding path program 1 times [2022-11-22 02:44:29,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:29,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172815130] [2022-11-22 02:44:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:29,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:29,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:44:29,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865428054] [2022-11-22 02:44:29,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:29,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:29,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:29,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:44:29,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:44:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:29,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:44:29,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:44:29,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:44:34,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:34,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172815130] [2022-11-22 02:44:34,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:44:34,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865428054] [2022-11-22 02:44:34,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865428054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:44:34,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [70348108] [2022-11-22 02:44:34,762 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:44:34,762 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:44:34,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:44:34,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:44:34,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:44:36,651 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-22 02:44:36,700 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:44:37,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '564#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:44:37,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:44:37,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:44:37,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-22 02:44:37,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432629027] [2022-11-22 02:44:37,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:44:37,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 02:44:37,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:37,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 02:44:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=387, Unknown=2, NotChecked=0, Total=462 [2022-11-22 02:44:37,468 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:44:54,603 WARN L233 SmtUtils]: Spent 15.02s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:44:57,357 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 02:44:59,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:45:01,369 WARN L539 Checker$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 02:45:09,702 WARN L233 SmtUtils]: Spent 6.53s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:45:22,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:45:24,669 WARN L539 Checker$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 02:45:26,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:45:27,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:45:29,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:45:31,060 WARN L539 Checker$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 02:45:33,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:45:36,303 WARN L539 Checker$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 02:45:38,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:45:40,558 WARN L539 Checker$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 02:45:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:45:40,568 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-11-22 02:45:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:45:40,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-22 02:45:40,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:45:40,570 INFO L225 Difference]: With dead ends: 59 [2022-11-22 02:45:40,571 INFO L226 Difference]: Without dead ends: 55 [2022-11-22 02:45:40,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=107, Invalid=540, Unknown=3, NotChecked=0, Total=650 [2022-11-22 02:45:40,575 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 31 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:45:40,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 78 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 127 Invalid, 11 Unknown, 0 Unchecked, 31.0s Time] [2022-11-22 02:45:40,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-22 02:45:40,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2022-11-22 02:45:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:45:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-22 02:45:40,609 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 17 [2022-11-22 02:45:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:45:40,610 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-22 02:45:40,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:45:40,610 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-22 02:45:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 02:45:40,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:45:40,612 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 02:45:40,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:45:40,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:45:40,818 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:45:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:45:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash 687309511, now seen corresponding path program 2 times [2022-11-22 02:45:40,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:45:40,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555526047] [2022-11-22 02:45:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:40,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:45:40,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:45:40,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195392788] [2022-11-22 02:45:40,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:45:40,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:45:40,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:45:40,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:45:40,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:45:42,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:45:42,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:45:42,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:45:42,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:45:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:45:43,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:45:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:45:43,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:45:43,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555526047] [2022-11-22 02:45:43,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:45:43,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195392788] [2022-11-22 02:45:43,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195392788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:45:43,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259912406] [2022-11-22 02:45:43,495 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:45:43,495 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:45:43,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:45:43,496 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:45:43,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:45:44,828 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-22 02:45:44,850 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:45:45,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '879#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:45:45,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:45:45,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:45:45,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-22 02:45:45,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423936573] [2022-11-22 02:45:45,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:45:45,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:45:45,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:45:45,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:45:45,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:45:45,675 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:45:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:45:46,176 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2022-11-22 02:45:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:45:46,178 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), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2022-11-22 02:45:46,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:45:46,180 INFO L225 Difference]: With dead ends: 60 [2022-11-22 02:45:46,180 INFO L226 Difference]: Without dead ends: 44 [2022-11-22 02:45:46,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:45:46,181 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:45:46,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 61 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:45:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-22 02:45:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-22 02:45:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:45:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-22 02:45:46,217 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 24 [2022-11-22 02:45:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:45:46,218 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-22 02:45:46,220 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), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:45:46,221 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-22 02:45:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 02:45:46,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:45:46,224 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:45:46,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:45:46,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:45:46,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:45:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:45:46,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1523523497, now seen corresponding path program 3 times [2022-11-22 02:45:46,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:45:46,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351429033] [2022-11-22 02:45:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:46,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:45:46,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:45:46,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143834988] [2022-11-22 02:45:46,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:45:46,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:45:46,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:45:46,460 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:45:46,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:45:46,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:45:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:45:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 02:45:46,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:45:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:45:47,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:46:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:04,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:04,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351429033] [2022-11-22 02:46:04,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:46:04,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143834988] [2022-11-22 02:46:04,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143834988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:46:04,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132838760] [2022-11-22 02:46:04,949 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:46:04,949 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:46:04,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:46:04,949 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:46:04,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:46:06,078 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-22 02:46:06,105 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:46:09,480 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1190#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:46:09,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:46:09,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:46:09,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-22 02:46:09,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409124037] [2022-11-22 02:46:09,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:46:09,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:46:09,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:09,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:46:09,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=683, Unknown=3, NotChecked=0, Total=812 [2022-11-22 02:46:09,484 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:46:12,911 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296))) (let ((.cse24 (* 2 (* (div .cse6 2) |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse18 (+ .cse24 |c_ULTIMATE.start_main_~r~0#1|)) (.cse11 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824)) (.cse23 (mod |c_ULTIMATE.start_main_~b~0#1| 536870912)) (.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse7 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse5 (<= (* 2 .cse4) .cse7)) (.cse17 (<= (* 8 .cse23) .cse7)) (.cse12 (<= (* .cse11 4) .cse7)) (.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse19 (* (div .cse18 4294967296) 4294967296))) (and (= .cse0 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) (or (let ((.cse3 (* (* .cse4 |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse1 4294967296) 4294967296))) (and (< .cse1 (+ .cse0 .cse2 1)) (< (+ .cse0 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) .cse5 (not (<= .cse6 .cse7))) (or (let ((.cse9 (* (* .cse11 |c_ULTIMATE.start_main_~q~0#1|) 4))) (let ((.cse10 (+ .cse9 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse8 (* (div .cse10 4294967296) 4294967296))) (and (< (+ .cse0 .cse8) (+ .cse9 |c_ULTIMATE.start_main_~r~0#1| 1)) (< .cse10 (+ .cse0 .cse8 1)))))) (not .cse5) .cse12) (let ((.cse16 (mod |c_ULTIMATE.start_main_~b~0#1| 268435456))) (or (let ((.cse14 (* (* .cse16 |c_ULTIMATE.start_main_~q~0#1|) 16))) (let ((.cse15 (+ |c_ULTIMATE.start_main_~r~0#1| .cse14))) (let ((.cse13 (* (div .cse15 4294967296) 4294967296))) (and (< (+ .cse0 .cse13) (+ |c_ULTIMATE.start_main_~r~0#1| .cse14 1)) (< .cse15 (+ .cse0 .cse13 1)))))) (not .cse17) (<= (* .cse16 16) .cse7))) (< .cse18 (+ .cse0 .cse19 1)) (or .cse17 (let ((.cse22 (* 8 (* .cse23 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse20 (+ .cse22 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse21 (* (div .cse20 4294967296) 4294967296))) (and (< .cse20 (+ .cse21 .cse0 1)) (< (+ .cse21 .cse0) (+ .cse22 |c_ULTIMATE.start_main_~r~0#1| 1)))))) (not .cse12)) (< (+ .cse0 .cse19) (+ .cse24 |c_ULTIMATE.start_main_~r~0#1| 1))))))) is different from false [2022-11-22 02:47:42,495 WARN L233 SmtUtils]: Spent 1.31m on a formula simplification that was a NOOP. DAG size: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:49:11,173 WARN L233 SmtUtils]: Spent 1.28m on a formula simplification that was a NOOP. DAG size: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:49:13,918 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 02:49:15,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:50:16,295 WARN L233 SmtUtils]: Spent 42.27s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:50:27,036 WARN L539 Checker$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 02:50:29,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:50:31,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:50:33,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:50:35,921 WARN L539 Checker$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 02:50:37,938 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296))) (let ((.cse19 (* 2 (* (div .cse6 2) |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse13 (+ .cse19 |c_ULTIMATE.start_main_~r~0#1|)) (.cse11 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824)) (.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse7 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse5 (<= (* 2 .cse4) .cse7)) (.cse12 (<= (* .cse11 4) .cse7)) (.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse14 (* (div .cse13 4294967296) 4294967296))) (and (or (let ((.cse3 (* (* .cse4 |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse0 4294967296) 4294967296))) (and (< .cse0 (+ .cse1 .cse2 1)) (< (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) .cse5 (not (<= .cse6 .cse7))) (or (let ((.cse9 (* (* .cse11 |c_ULTIMATE.start_main_~q~0#1|) 4))) (let ((.cse10 (+ .cse9 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse8 (* (div .cse10 4294967296) 4294967296))) (and (< (+ .cse1 .cse8) (+ .cse9 |c_ULTIMATE.start_main_~r~0#1| 1)) (< .cse10 (+ .cse1 .cse8 1)))))) (not .cse5) .cse12) (< .cse13 (+ .cse1 .cse14 1)) (let ((.cse15 (mod |c_ULTIMATE.start_main_~b~0#1| 536870912))) (or (<= (* 8 .cse15) .cse7) (let ((.cse18 (* 8 (* .cse15 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse16 (+ .cse18 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse17 (* (div .cse16 4294967296) 4294967296))) (and (< .cse16 (+ .cse17 .cse1 1)) (< (+ .cse17 .cse1) (+ .cse18 |c_ULTIMATE.start_main_~r~0#1| 1)))))) (not .cse12))) (< (+ .cse1 .cse14) (+ .cse19 |c_ULTIMATE.start_main_~r~0#1| 1))))))) is different from false [2022-11-22 02:50:39,998 WARN L539 Checker$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 02:50:42,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:50:44,009 WARN L539 Checker$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 02:51:08,330 WARN L233 SmtUtils]: Spent 12.05s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:51:12,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:51:14,502 WARN L539 Checker$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 02:51:58,593 WARN L233 SmtUtils]: Spent 28.74s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:52:00,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:52:02,615 WARN L539 Checker$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 02:52:04,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:52:06,640 WARN L539 Checker$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 02:52:14,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:52:17,213 WARN L539 Checker$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 02:52:19,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:52:34,898 WARN L233 SmtUtils]: Spent 8.79s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:52:36,903 WARN L539 Checker$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 02:52:40,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:52:44,528 WARN L539 Checker$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 02:52:45,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:52:49,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:52:53,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:52:54,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:52:56,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:52:58,336 WARN L539 Checker$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 02:52:59,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:53:01,892 WARN L539 Checker$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 02:53:04,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:53:06,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:53:09,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:53:11,979 WARN L539 Checker$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 02:53:13,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:53:17,483 WARN L539 Checker$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 02:53:19,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:53:21,499 WARN L539 Checker$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 02:53:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:53:21,500 INFO L93 Difference]: Finished difference Result 93 states and 113 transitions. [2022-11-22 02:53:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 02:53:21,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-22 02:53:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:53:21,537 INFO L225 Difference]: With dead ends: 93 [2022-11-22 02:53:21,537 INFO L226 Difference]: Without dead ends: 88 [2022-11-22 02:53:21,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 355.2s TimeCoverageRelationStatistics Valid=255, Invalid=1133, Unknown=26, NotChecked=146, Total=1560 [2022-11-22 02:53:21,538 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 61 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 95.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:53:21,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 187 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 371 Invalid, 31 Unknown, 14 Unchecked, 95.0s Time] [2022-11-22 02:53:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-22 02:53:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2022-11-22 02:53:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 63 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-22 02:53:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2022-11-22 02:53:21,587 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 23 [2022-11-22 02:53:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:53:21,588 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2022-11-22 02:53:21,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:53:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2022-11-22 02:53:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 02:53:21,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:53:21,593 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2022-11-22 02:53:21,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:53:21,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:53:21,799 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:53:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:53:21,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1838953197, now seen corresponding path program 4 times [2022-11-22 02:53:21,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:53:21,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338655970] [2022-11-22 02:53:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:53:21,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:53:21,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:53:21,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173152845] [2022-11-22 02:53:21,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:53:21,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:53:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:53:21,818 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:53:21,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:53:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:53:22,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:53:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:53:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:53:22,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:53:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:53:23,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:53:23,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338655970] [2022-11-22 02:53:23,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:53:23,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173152845] [2022-11-22 02:53:23,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173152845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:53:23,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1615144657] [2022-11-22 02:53:23,648 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:53:23,649 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:53:23,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:53:23,649 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:53:23,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:53:24,594 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-22 02:53:24,640 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:53:26,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1680#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:53:26,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:53:26,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:53:26,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2022-11-22 02:53:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343166551] [2022-11-22 02:53:26,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:53:26,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:53:26,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:53:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:53:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:53:26,066 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:53:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:53:27,582 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2022-11-22 02:53:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:53:27,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2022-11-22 02:53:27,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:53:27,584 INFO L225 Difference]: With dead ends: 95 [2022-11-22 02:53:27,585 INFO L226 Difference]: Without dead ends: 72 [2022-11-22 02:53:27,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:53:27,586 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:53:27,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 02:53:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-22 02:53:27,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-11-22 02:53:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 58 states have internal predecessors, (64), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 02:53:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-11-22 02:53:27,629 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 33 [2022-11-22 02:53:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:53:27,629 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-11-22 02:53:27,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:53:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-11-22 02:53:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 02:53:27,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:53:27,630 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-22 02:53:27,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:53:27,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:53:27,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:53:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:53:27,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1750527155, now seen corresponding path program 5 times [2022-11-22 02:53:27,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:53:27,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856625339] [2022-11-22 02:53:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:53:27,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:53:27,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:53:27,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148102709] [2022-11-22 02:53:27,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:53:27,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:53:27,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:53:27,852 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:53:27,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06d641e-2c16-4b89-a7f6-e56a28483c6d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:53:58,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:53:58,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:53:58,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-22 02:53:58,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:54:18,472 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:55:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:55:35,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:56:22,791 WARN L233 SmtUtils]: Spent 23.88s on a formula simplification. DAG size of input: 59 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:57:06,817 WARN L233 SmtUtils]: Spent 17.98s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:58:09,972 WARN L233 SmtUtils]: Spent 27.18s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:59:01,346 WARN L233 SmtUtils]: Spent 8.95s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:59:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:59:09,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:59:09,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856625339] [2022-11-22 02:59:09,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:59:09,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148102709] [2022-11-22 02:59:09,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148102709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:59:09,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1718430778] [2022-11-22 02:59:09,581 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:59:09,582 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:59:09,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:59:09,582 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:59:09,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:59:10,472 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-22 02:59:10,497 INFO L180 IcfgInterpreter]: Interpretation finished