./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/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_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/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_bfe23905-4119-4f23-8e97-d2c9e6854f77/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 eb7e704db84b45f8c7f1cb386fc610e1107f57c6e67c0a3b2af510d7426cfd4f --- 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 01:41:09,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:41:09,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:41:09,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:41:09,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:41:09,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:41:09,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:41:09,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:41:09,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:41:09,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:41:09,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:41:09,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:41:09,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:41:09,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:41:09,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:41:09,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:41:09,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:41:09,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:41:09,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:41:09,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:41:09,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:41:09,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:41:09,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:41:09,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:41:09,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:41:09,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:41:09,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:41:09,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:41:09,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:41:09,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:41:09,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:41:09,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:41:09,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:41:09,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:41:09,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:41:09,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:41:09,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:41:09,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:41:09,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:41:09,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:41:09,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:41:09,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:41:09,426 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:41:09,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:41:09,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:41:09,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:41:09,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:41:09,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:41:09,436 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:41:09,436 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:41:09,436 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:41:09,436 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:41:09,438 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:41:09,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:41:09,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:41:09,439 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:41:09,439 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:41:09,439 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:41:09,440 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:41:09,440 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:41:09,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:41:09,442 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:41:09,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:41:09,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:41:09,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:41:09,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:41:09,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:41:09,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:41:09,444 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:41:09,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:41:09,445 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:41:09,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:41:09,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:41:09,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:41:09,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:41:09,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:41:09,448 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:41:09,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:41:09,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:41:09,449 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:41:09,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:41:09,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:41:09,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:41:09,450 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_bfe23905-4119-4f23-8e97-d2c9e6854f77/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb7e704db84b45f8c7f1cb386fc610e1107f57c6e67c0a3b2af510d7426cfd4f [2022-11-22 01:41:09,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:41:09,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:41:09,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:41:09,735 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:41:09,736 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:41:09,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c [2022-11-22 01:41:12,911 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:41:13,179 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:41:13,179 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c [2022-11-22 01:41:13,187 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/data/cb2ce88a3/8f4d6dbb599e44bc861f9d67b14ab9ef/FLAG14cd01e56 [2022-11-22 01:41:13,214 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/data/cb2ce88a3/8f4d6dbb599e44bc861f9d67b14ab9ef [2022-11-22 01:41:13,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:41:13,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:41:13,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:41:13,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:41:13,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:41:13,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fa0e7b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13, skipping insertion in model container [2022-11-22 01:41:13,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:41:13,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:41:13,498 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_bfe23905-4119-4f23-8e97-d2c9e6854f77/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c[525,538] [2022-11-22 01:41:13,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:41:13,562 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:41:13,579 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_bfe23905-4119-4f23-8e97-d2c9e6854f77/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c[525,538] [2022-11-22 01:41:13,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:41:13,636 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:41:13,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13 WrapperNode [2022-11-22 01:41:13,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:41:13,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:41:13,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:41:13,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:41:13,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,717 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-22 01:41:13,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:41:13,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:41:13,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:41:13,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:41:13,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,748 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:41:13,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:41:13,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:41:13,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:41:13,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (1/1) ... [2022-11-22 01:41:13,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:41:13,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:13,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:41:13,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:41:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:41:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:41:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:41:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:41:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 01:41:13,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 01:41:13,894 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:41:13,896 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:41:14,362 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:41:14,448 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:41:14,453 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 01:41:14,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:41:14 BoogieIcfgContainer [2022-11-22 01:41:14,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:41:14,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:41:14,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:41:14,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:41:14,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:41:13" (1/3) ... [2022-11-22 01:41:14,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8cdf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:41:14, skipping insertion in model container [2022-11-22 01:41:14,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:41:13" (2/3) ... [2022-11-22 01:41:14,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8cdf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:41:14, skipping insertion in model container [2022-11-22 01:41:14,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:41:14" (3/3) ... [2022-11-22 01:41:14,471 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound5.c [2022-11-22 01:41:14,493 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:41:14,493 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:41:14,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:41:14,572 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;@53c4948b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:41:14,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:41:14,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 01:41:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:41:14,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:14,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:14,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:41:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:14,602 INFO L85 PathProgramCache]: Analyzing trace with hash -678335095, now seen corresponding path program 1 times [2022-11-22 01:41:14,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:14,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619347502] [2022-11-22 01:41:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:14,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:14,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:14,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619347502] [2022-11-22 01:41:14,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-22 01:41:14,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218849675] [2022-11-22 01:41:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:14,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:14,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:14,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:14,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:41:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:14,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-22 01:41:14,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:14,955 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 01:41:14,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:41:14,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218849675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:14,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:41:14,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:41:14,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826659119] [2022-11-22 01:41:14,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:14,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:41:14,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:15,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:41:15,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:41:15,018 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:15,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:15,070 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2022-11-22 01:41:15,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:41:15,073 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 01:41:15,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:15,081 INFO L225 Difference]: With dead ends: 44 [2022-11-22 01:41:15,081 INFO L226 Difference]: Without dead ends: 22 [2022-11-22 01:41:15,086 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 01:41:15,091 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:15,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:41:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-22 01:41:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-22 01:41:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:41:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2022-11-22 01:41:15,138 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2022-11-22 01:41:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:15,138 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2022-11-22 01:41:15,140 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 01:41:15,140 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2022-11-22 01:41:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:41:15,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:15,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:15,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:15,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 01:41:15,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:41:15,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash 520368722, now seen corresponding path program 1 times [2022-11-22 01:41:15,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:15,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014337504] [2022-11-22 01:41:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:15,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:15,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:15,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014337504] [2022-11-22 01:41:15,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-22 01:41:15,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296874123] [2022-11-22 01:41:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:15,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:15,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:15,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:15,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:41:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:15,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:41:15,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:15,534 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 01:41:15,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:41:15,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296874123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:15,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:41:15,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:41:15,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394893595] [2022-11-22 01:41:15,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:15,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:41:15,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:15,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:41:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:41:15,538 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:15,591 INFO L93 Difference]: Finished difference Result 42 states and 63 transitions. [2022-11-22 01:41:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:41:15,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:41:15,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:15,595 INFO L225 Difference]: With dead ends: 42 [2022-11-22 01:41:15,595 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 01:41:15,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:41:15,600 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:15,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:41:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 01:41:15,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-22 01:41:15,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:41:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2022-11-22 01:41:15,621 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 9 [2022-11-22 01:41:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:15,623 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2022-11-22 01:41:15,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2022-11-22 01:41:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:41:15,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:15,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:15,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:15,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:15,831 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:41:15,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:15,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1389535714, now seen corresponding path program 1 times [2022-11-22 01:41:15,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:15,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475289379] [2022-11-22 01:41:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:15,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:15,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:41:15,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72690221] [2022-11-22 01:41:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:15,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:15,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:15,873 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:15,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:41:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:15,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:41:15,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:15,985 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 01:41:15,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:41:15,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:15,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475289379] [2022-11-22 01:41:15,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:41:15,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72690221] [2022-11-22 01:41:15,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72690221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:15,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:41:15,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:41:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994508824] [2022-11-22 01:41:15,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:15,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:41:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:41:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:41:15,989 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:16,034 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2022-11-22 01:41:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:41:16,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:41:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:16,037 INFO L225 Difference]: With dead ends: 37 [2022-11-22 01:41:16,039 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 01:41:16,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:41:16,041 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:16,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:41:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 01:41:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-22 01:41:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 01:41:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2022-11-22 01:41:16,048 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 10 [2022-11-22 01:41:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:16,048 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2022-11-22 01:41:16,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2022-11-22 01:41:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:41:16,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:16,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:16,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:16,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:16,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:41:16,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:16,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1388046164, now seen corresponding path program 1 times [2022-11-22 01:41:16,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:16,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969873031] [2022-11-22 01:41:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:16,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:16,855 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 01:41:16,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969873031] [2022-11-22 01:41:16,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969873031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:16,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:41:16,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:41:16,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386902166] [2022-11-22 01:41:16,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:16,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:41:16,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:16,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:41:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:41:16,858 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:19,292 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 01:41:21,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:41:23,361 WARN L539 Checker$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 01:41:25,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:41:27,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:41:27,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:27,210 INFO L93 Difference]: Finished difference Result 59 states and 89 transitions. [2022-11-22 01:41:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:41:27,214 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 01:41:27,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:27,215 INFO L225 Difference]: With dead ends: 59 [2022-11-22 01:41:27,215 INFO L226 Difference]: Without dead ends: 39 [2022-11-22 01:41:27,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:41:27,217 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 24 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:27,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 107 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 93 Invalid, 4 Unknown, 0 Unchecked, 10.3s Time] [2022-11-22 01:41:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-22 01:41:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-22 01:41:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 01:41:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2022-11-22 01:41:27,260 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 10 [2022-11-22 01:41:27,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:27,262 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2022-11-22 01:41:27,263 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 01:41:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2022-11-22 01:41:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:41:27,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:27,269 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:27,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:41:27,270 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:41:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:27,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1970023331, now seen corresponding path program 1 times [2022-11-22 01:41:27,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:27,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141698023] [2022-11-22 01:41:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:27,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:27,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:41:27,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618369014] [2022-11-22 01:41:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:27,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:27,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:27,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:27,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:41:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:27,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:41:27,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:27,388 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 01:41:27,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:27,446 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 01:41:27,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:27,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141698023] [2022-11-22 01:41:27,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:41:27,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618369014] [2022-11-22 01:41:27,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618369014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:27,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197378612] [2022-11-22 01:41:27,470 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-22 01:41:27,471 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:41:27,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:41:27,482 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:41:27,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:41:27,870 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2022-11-22 01:41:27,880 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:41:28,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [197378612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:28,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:41:28,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 15 [2022-11-22 01:41:28,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000941268] [2022-11-22 01:41:28,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:28,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:41:28,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:41:28,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:41:28,171 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:29,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:29,293 INFO L93 Difference]: Finished difference Result 78 states and 117 transitions. [2022-11-22 01:41:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:41:29,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 01:41:29,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:29,295 INFO L225 Difference]: With dead ends: 78 [2022-11-22 01:41:29,295 INFO L226 Difference]: Without dead ends: 59 [2022-11-22 01:41:29,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:41:29,297 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 15 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:29,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 86 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:41:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-22 01:41:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2022-11-22 01:41:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 01:41:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-11-22 01:41:29,315 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 12 [2022-11-22 01:41:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:29,315 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-11-22 01:41:29,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-11-22 01:41:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:41:29,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:29,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:29,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:29,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:29,522 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:41:29,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:29,522 INFO L85 PathProgramCache]: Analyzing trace with hash 600084205, now seen corresponding path program 1 times [2022-11-22 01:41:29,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:29,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986922129] [2022-11-22 01:41:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:29,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:29,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:41:29,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729049498] [2022-11-22 01:41:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:29,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:29,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:29,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:29,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:41:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:29,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:41:29,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:29,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:29,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:29,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986922129] [2022-11-22 01:41:29,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:41:29,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729049498] [2022-11-22 01:41:29,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729049498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:29,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1146856810] [2022-11-22 01:41:29,683 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-22 01:41:29,684 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:41:29,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:41:29,685 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:41:29,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:41:29,935 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2022-11-22 01:41:29,942 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:41:30,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1146856810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:41:30,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:41:30,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 5] total 16 [2022-11-22 01:41:30,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101906782] [2022-11-22 01:41:30,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:41:30,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:41:30,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:30,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:41:30,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:41:30,259 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:32,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:41:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:33,904 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2022-11-22 01:41:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:41:33,911 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 01:41:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:33,913 INFO L225 Difference]: With dead ends: 68 [2022-11-22 01:41:33,913 INFO L226 Difference]: Without dead ends: 65 [2022-11-22 01:41:33,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:41:33,914 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:33,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 149 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-22 01:41:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-22 01:41:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2022-11-22 01:41:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 01:41:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2022-11-22 01:41:33,964 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 13 [2022-11-22 01:41:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:33,965 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2022-11-22 01:41:33,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2022-11-22 01:41:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:41:33,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:33,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:33,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:34,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 01:41:34,167 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:41:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash 601573755, now seen corresponding path program 1 times [2022-11-22 01:41:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:41:34,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921367280] [2022-11-22 01:41:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:34,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:41:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:34,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:41:34,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921367280] [2022-11-22 01:41:34,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921367280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:41:34,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564566995] [2022-11-22 01:41:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:41:34,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:34,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:34,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:34,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:41:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:41:34,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:41:34,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:34,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:34,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564566995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:34,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1649894153] [2022-11-22 01:41:34,851 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-22 01:41:34,851 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:41:34,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:41:34,851 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:41:34,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:41:35,047 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-11-22 01:41:35,086 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:41:35,657 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1215#(and (<= 2 ~counter~0) (< ~counter~0 6) (= |__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 01:41:35,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:41:35,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:41:35,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-22 01:41:35,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348514818] [2022-11-22 01:41:35,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:41:35,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:41:35,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:41:35,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:41:35,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:41:35,660 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:41,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:41:42,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:41:44,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:41:47,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:41:51,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:41:53,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:41:58,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:42:01,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:01,864 INFO L93 Difference]: Finished difference Result 116 states and 177 transitions. [2022-11-22 01:42:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:42:01,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 01:42:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:01,866 INFO L225 Difference]: With dead ends: 116 [2022-11-22 01:42:01,866 INFO L226 Difference]: Without dead ends: 89 [2022-11-22 01:42:01,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:42:01,868 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 90 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 190 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:01,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 214 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 260 Invalid, 4 Unknown, 0 Unchecked, 26.0s Time] [2022-11-22 01:42:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-22 01:42:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2022-11-22 01:42:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 29 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-22 01:42:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2022-11-22 01:42:01,907 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 13 [2022-11-22 01:42:01,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:01,907 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2022-11-22 01:42:01,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2022-11-22 01:42:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:42:01,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:01,909 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:01,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:42:02,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:02,125 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:42:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:02,125 INFO L85 PathProgramCache]: Analyzing trace with hash -339513844, now seen corresponding path program 1 times [2022-11-22 01:42:02,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:02,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017340654] [2022-11-22 01:42:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:02,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:42:02,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888203869] [2022-11-22 01:42:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:02,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:02,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:02,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:02,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:42:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:02,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:42:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:42:02,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:42:13,225 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~r~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 16 |ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~n~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) (not (= (mod (* |ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))))) is different from false [2022-11-22 01:42:14,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:14,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017340654] [2022-11-22 01:42:14,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:42:14,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888203869] [2022-11-22 01:42:14,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888203869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:42:14,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330685235] [2022-11-22 01:42:14,837 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:42:14,837 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:42:14,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:42:14,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:42:14,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:42:15,133 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2022-11-22 01:42:15,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:42:19,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1330685235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:19,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:42:19,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2022-11-22 01:42:19,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260931935] [2022-11-22 01:42:19,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:19,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:42:19,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:19,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:42:19,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=239, Unknown=2, NotChecked=32, Total=342 [2022-11-22 01:42:19,704 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:42:22,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-22 01:42:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:24,013 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2022-11-22 01:42:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:42:24,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-22 01:42:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:24,018 INFO L225 Difference]: With dead ends: 74 [2022-11-22 01:42:24,018 INFO L226 Difference]: Without dead ends: 54 [2022-11-22 01:42:24,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=69, Invalid=239, Unknown=2, NotChecked=32, Total=342 [2022-11-22 01:42:24,019 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:24,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 72 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 129 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-22 01:42:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-22 01:42:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-22 01:42:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 01:42:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 79 transitions. [2022-11-22 01:42:24,034 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 79 transitions. Word has length 20 [2022-11-22 01:42:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:24,035 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 79 transitions. [2022-11-22 01:42:24,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:42:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 79 transitions. [2022-11-22 01:42:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:42:24,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:24,036 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:24,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:42:24,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:24,242 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:42:24,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1744099301, now seen corresponding path program 1 times [2022-11-22 01:42:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:24,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936141293] [2022-11-22 01:42:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:24,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:24,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:42:24,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218190730] [2022-11-22 01:42:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:24,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:24,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:24,253 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:24,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:42:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:24,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:42:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:42:24,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:42:35,011 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~q~0#1| Int) (|ULTIMATE.start_main_~r~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) 4294967296) (mod (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) 4294967296))) (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 4294967280) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 12) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 16 |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1| 4294967284) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296) 0))) is different from false [2022-11-22 01:42:35,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936141293] [2022-11-22 01:42:35,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:42:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218190730] [2022-11-22 01:42:35,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218190730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:42:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268188556] [2022-11-22 01:42:35,053 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:42:35,053 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:42:35,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:42:35,054 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:42:35,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:42:37,374 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-22 01:42:37,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:42:50,650 WARN L233 SmtUtils]: Spent 7.74s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:42:50,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1918#(and (<= 2 ~counter~0) (<= ~counter~0 6) (= |__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 01:42:50,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:42:50,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:42:50,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-11-22 01:42:50,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78201576] [2022-11-22 01:42:50,651 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-22 01:42:50,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:42:50,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:50,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:42:50,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=367, Unknown=3, NotChecked=40, Total=506 [2022-11-22 01:42:50,653 INFO L87 Difference]: Start difference. First operand 54 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:42:52,662 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 01:42:54,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:42:57,495 WARN L539 Checker$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 01:42:59,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:43:01,498 WARN L539 Checker$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 01:43:03,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:43:08,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:43:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:11,056 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2022-11-22 01:43:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:43:11,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-22 01:43:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:11,059 INFO L225 Difference]: With dead ends: 64 [2022-11-22 01:43:11,059 INFO L226 Difference]: Without dead ends: 61 [2022-11-22 01:43:11,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=110, Invalid=443, Unknown=3, NotChecked=44, Total=600 [2022-11-22 01:43:11,061 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:11,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 69 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 6 Unknown, 0 Unchecked, 20.2s Time] [2022-11-22 01:43:11,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-22 01:43:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-22 01:43:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 22 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 01:43:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2022-11-22 01:43:11,083 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 23 [2022-11-22 01:43:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:11,083 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2022-11-22 01:43:11,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:43:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2022-11-22 01:43:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 01:43:11,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:11,085 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:43:11,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:11,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:11,292 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:43:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash -787687870, now seen corresponding path program 1 times [2022-11-22 01:43:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:43:11,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164477647] [2022-11-22 01:43:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:43:11,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:43:11,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092142133] [2022-11-22 01:43:11,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:11,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:43:11,307 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:43:11,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:43:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:11,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:43:11,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 01:43:11,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 01:43:11,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:43:11,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164477647] [2022-11-22 01:43:11,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:43:11,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092142133] [2022-11-22 01:43:11,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092142133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:11,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [750504187] [2022-11-22 01:43:11,559 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 01:43:11,559 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:43:11,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:43:11,560 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:43:11,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:43:42,455 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-22 01:43:42,461 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:44:04,824 WARN L233 SmtUtils]: Spent 16.77s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:44:49,278 WARN L233 SmtUtils]: Spent 18.32s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:45:43,822 WARN L233 SmtUtils]: Spent 27.42s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:46:37,922 WARN L233 SmtUtils]: Spent 19.29s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:47:00,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2405#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 7) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:47:00,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:47:00,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:47:00,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-11-22 01:47:00,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858940932] [2022-11-22 01:47:00,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:47:00,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:47:00,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:47:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:47:00,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=466, Unknown=32, NotChecked=0, Total=600 [2022-11-22 01:47:00,604 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 01:47:07,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:47:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:09,139 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2022-11-22 01:47:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:47:09,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 46 [2022-11-22 01:47:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:09,141 INFO L225 Difference]: With dead ends: 129 [2022-11-22 01:47:09,141 INFO L226 Difference]: Without dead ends: 120 [2022-11-22 01:47:09,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 202.2s TimeCoverageRelationStatistics Valid=114, Invalid=554, Unknown=34, NotChecked=0, Total=702 [2022-11-22 01:47:09,143 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:09,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 142 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 65 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-22 01:47:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-22 01:47:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2022-11-22 01:47:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.125) internal successors, (72), 66 states have internal predecessors, (72), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-22 01:47:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 142 transitions. [2022-11-22 01:47:09,166 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 142 transitions. Word has length 46 [2022-11-22 01:47:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:09,167 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 142 transitions. [2022-11-22 01:47:09,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 01:47:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 142 transitions. [2022-11-22 01:47:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 01:47:09,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:09,169 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:47:09,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-22 01:47:09,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:47:09,375 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:47:09,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:09,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1687602719, now seen corresponding path program 1 times [2022-11-22 01:47:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:47:09,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357090012] [2022-11-22 01:47:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:09,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:47:09,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:47:09,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422723939] [2022-11-22 01:47:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:09,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:09,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:09,394 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:09,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:47:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:47:09,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-22 01:47:09,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 23 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 01:47:10,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:40,617 WARN L233 SmtUtils]: Spent 16.55s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:47:40,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:47:40,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357090012] [2022-11-22 01:47:40,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:47:40,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422723939] [2022-11-22 01:47:40,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422723939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:47:40,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [720315613] [2022-11-22 01:47:40,622 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-22 01:47:40,622 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:47:40,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:47:40,623 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:47:40,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:48:02,065 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-22 01:48:02,071 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:48:43,052 WARN L233 SmtUtils]: Spent 19.26s on a formula simplification. DAG size of input: 51 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:49:44,879 WARN L233 SmtUtils]: Spent 40.40s on a formula simplification. DAG size of input: 71 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:51:36,402 WARN L233 SmtUtils]: Spent 1.31m on a formula simplification. DAG size of input: 88 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:53:12,169 WARN L233 SmtUtils]: Spent 50.85s on a formula simplification. DAG size of input: 100 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:53:48,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2990#(and (<= 2 ~counter~0) (<= ~counter~0 6) (= |__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 01:53:48,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:53:48,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:53:48,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-22 01:53:48,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240137384] [2022-11-22 01:53:48,375 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:48,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 01:53:48,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 01:53:48,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1012, Unknown=47, NotChecked=0, Total=1190 [2022-11-22 01:53:48,377 INFO L87 Difference]: Start difference. First operand 112 states and 142 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 01:53:56,175 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 01:54:00,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:54:02,639 WARN L539 Checker$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 01:54:04,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:54:10,699 WARN L539 Checker$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 01:54:12,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:54:14,702 WARN L539 Checker$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 01:54:16,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:54:18,705 WARN L539 Checker$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 01:54:20,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:54:22,708 WARN L539 Checker$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 01:54:24,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 01:54:26,710 WARN L539 Checker$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 01:54:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:26,977 INFO L93 Difference]: Finished difference Result 138 states and 175 transitions. [2022-11-22 01:54:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:54:26,977 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2022-11-22 01:54:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:26,979 INFO L225 Difference]: With dead ends: 138 [2022-11-22 01:54:26,979 INFO L226 Difference]: Without dead ends: 129 [2022-11-22 01:54:26,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 377.9s TimeCoverageRelationStatistics Valid=145, Invalid=1140, Unknown=47, NotChecked=0, Total=1332 [2022-11-22 01:54:26,981 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 12 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:26,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 175 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 720 Invalid, 13 Unknown, 0 Unchecked, 36.6s Time] [2022-11-22 01:54:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-22 01:54:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-11-22 01:54:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 75 states have internal predecessors, (80), 42 states have call successors, (42), 13 states have call predecessors, (42), 13 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-22 01:54:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions. [2022-11-22 01:54:27,007 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 49 [2022-11-22 01:54:27,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:27,008 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions. [2022-11-22 01:54:27,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 01:54:27,008 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions. [2022-11-22 01:54:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 01:54:27,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:27,010 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:27,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:27,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:27,217 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:54:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1629435887, now seen corresponding path program 2 times [2022-11-22 01:54:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:54:27,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296049593] [2022-11-22 01:54:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:27,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:54:27,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:54:27,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736077549] [2022-11-22 01:54:27,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:54:27,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:27,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:27,228 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:27,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe23905-4119-4f23-8e97-d2c9e6854f77/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:54:27,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:54:27,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:54:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 01:54:27,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-22 01:54:27,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:48,793 WARN L233 SmtUtils]: Spent 9.28s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:56:03,344 WARN L233 SmtUtils]: Spent 9.51s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)