./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF --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 e0f65ddacc19e229149f7733305e27ede1d7c46ea04122324ae4c2ba294bcff0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:29:33,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:29:33,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:29:33,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:29:33,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:29:33,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:29:33,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:29:33,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:29:33,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:29:33,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:29:33,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:29:33,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:29:33,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:29:33,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:29:33,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:29:33,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:29:33,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:29:33,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:29:33,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:29:33,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:29:33,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:29:33,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:29:33,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:29:33,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:29:33,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:29:33,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:29:33,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:29:33,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:29:33,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:29:33,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:29:33,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:29:33,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:29:33,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:29:33,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:29:33,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:29:33,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:29:33,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:29:33,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:29:33,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:29:33,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:29:33,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:29:33,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:29:33,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:29:33,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:29:33,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:29:33,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:29:33,368 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:29:33,368 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:29:33,368 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:29:33,369 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:29:33,375 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:29:33,376 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:29:33,377 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:29:33,377 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:29:33,378 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:29:33,378 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:29:33,378 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:29:33,378 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:29:33,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:29:33,379 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:29:33,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:29:33,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:29:33,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:29:33,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:29:33,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:29:33,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:29:33,381 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:29:33,381 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:29:33,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:29:33,382 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:29:33,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:29:33,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:29:33,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:29:33,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:33,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:29:33,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:29:33,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:29:33,386 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:29:33,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:29:33,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:29:33,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:29:33,387 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:29:33,387 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0f65ddacc19e229149f7733305e27ede1d7c46ea04122324ae4c2ba294bcff0 [2021-11-12 22:29:33,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:29:33,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:29:33,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:29:33,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:29:33,723 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:29:33,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M1-2.c [2021-11-12 22:29:33,789 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/data/e90eb1bfb/e486ec07c2ce48bc843c9c2d71c4e5d6/FLAG1e28f800c [2021-11-12 22:29:34,455 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:29:34,456 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M1-2.c [2021-11-12 22:29:34,484 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/data/e90eb1bfb/e486ec07c2ce48bc843c9c2d71c4e5d6/FLAG1e28f800c [2021-11-12 22:29:34,625 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/data/e90eb1bfb/e486ec07c2ce48bc843c9c2d71c4e5d6 [2021-11-12 22:29:34,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:29:34,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:29:34,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:34,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:29:34,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:29:34,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:34" (1/1) ... [2021-11-12 22:29:34,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b4fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:34, skipping insertion in model container [2021-11-12 22:29:34,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:34" (1/1) ... [2021-11-12 22:29:34,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:29:34,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:29:34,942 WARN L228 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_0bcd8317-0a80-47de-8b05-0b6b592a90b8/sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M1-2.c[1974,1987] [2021-11-12 22:29:35,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:35,447 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:29:35,465 WARN L228 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_0bcd8317-0a80-47de-8b05-0b6b592a90b8/sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M1-2.c[1974,1987] [2021-11-12 22:29:35,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:35,748 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:29:35,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35 WrapperNode [2021-11-12 22:29:35,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:35,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:35,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:29:35,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:29:35,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35" (1/1) ... [2021-11-12 22:29:35,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35" (1/1) ... [2021-11-12 22:29:36,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:36,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:29:36,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:29:36,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:29:36,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35" (1/1) ... [2021-11-12 22:29:36,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35" (1/1) ... [2021-11-12 22:29:36,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35" (1/1) ... [2021-11-12 22:29:36,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35" (1/1) ... [2021-11-12 22:29:36,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35" (1/1) ... [2021-11-12 22:29:36,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35" (1/1) ... [2021-11-12 22:29:36,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35" (1/1) ... [2021-11-12 22:29:36,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:29:36,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:29:36,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:29:36,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:29:36,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35" (1/1) ... [2021-11-12 22:29:36,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:36,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:36,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:29:36,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:29:36,599 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_forward [2021-11-12 22:29:36,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_forward [2021-11-12 22:29:36,599 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2021-11-12 22:29:36,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2021-11-12 22:29:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2021-11-12 22:29:36,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2021-11-12 22:29:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:29:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2021-11-12 22:29:36,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2021-11-12 22:29:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2021-11-12 22:29:36,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2021-11-12 22:29:36,601 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2021-11-12 22:29:36,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2021-11-12 22:29:36,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-12 22:29:36,601 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2021-11-12 22:29:36,601 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2021-11-12 22:29:36,601 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2021-11-12 22:29:36,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2021-11-12 22:29:36,601 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_turn [2021-11-12 22:29:36,602 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_turn [2021-11-12 22:29:36,602 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-11-12 22:29:36,602 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-11-12 22:29:36,602 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-11-12 22:29:36,602 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-11-12 22:29:36,602 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts3 [2021-11-12 22:29:36,602 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts3 [2021-11-12 22:29:36,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:29:36,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-12 22:29:36,603 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-11-12 22:29:36,603 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-11-12 22:29:36,603 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2021-11-12 22:29:36,603 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2021-11-12 22:29:36,603 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_forward [2021-11-12 22:29:36,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_forward [2021-11-12 22:29:36,604 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2021-11-12 22:29:36,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2021-11-12 22:29:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:29:36,605 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:29:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:29:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:29:36,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:29:36,606 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2021-11-12 22:29:36,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2021-11-12 22:29:36,606 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2021-11-12 22:29:36,606 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2021-11-12 22:29:36,606 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2021-11-12 22:29:36,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2021-11-12 22:29:36,607 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_turn [2021-11-12 22:29:36,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_turn [2021-11-12 22:29:48,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:29:48,682 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:29:48,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:48 BoogieIcfgContainer [2021-11-12 22:29:48,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:29:48,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:29:48,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:29:48,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:29:48,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:29:34" (1/3) ... [2021-11-12 22:29:48,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38755992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:48, skipping insertion in model container [2021-11-12 22:29:48,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:35" (2/3) ... [2021-11-12 22:29:48,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38755992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:48, skipping insertion in model container [2021-11-12 22:29:48,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:48" (3/3) ... [2021-11-12 22:29:48,703 INFO L111 eAbstractionObserver]: Analyzing ICFG rekh_aso.2.M1-2.c [2021-11-12 22:29:48,712 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:29:48,712 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:29:48,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:29:48,797 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:29:48,797 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:29:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 2319 states, 1330 states have (on average 1.199248120300752) internal successors, (1595), 1334 states have internal predecessors, (1595), 966 states have call successors, (966), 21 states have call predecessors, (966), 21 states have return successors, (966), 964 states have call predecessors, (966), 966 states have call successors, (966) [2021-11-12 22:29:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2021-11-12 22:29:49,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:49,010 INFO L514 BasicCegarLoop]: trace histogram [209, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:49,011 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:49,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:49,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2082850204, now seen corresponding path program 1 times [2021-11-12 22:29:49,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:29:49,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184543122] [2021-11-12 22:29:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:49,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:29:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 43472 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43472 trivial. 0 not checked. [2021-11-12 22:29:50,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:29:50,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184543122] [2021-11-12 22:29:50,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184543122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:50,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:50,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:29:50,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010041293] [2021-11-12 22:29:50,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:50,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:29:50,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:29:50,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:29:50,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:29:50,839 INFO L87 Difference]: Start difference. First operand has 2319 states, 1330 states have (on average 1.199248120300752) internal successors, (1595), 1334 states have internal predecessors, (1595), 966 states have call successors, (966), 21 states have call predecessors, (966), 21 states have return successors, (966), 964 states have call predecessors, (966), 966 states have call successors, (966) Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 2 states have call successors, (212), 2 states have call predecessors, (212), 2 states have return successors, (211), 2 states have call predecessors, (211), 2 states have call successors, (211) [2021-11-12 22:29:52,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:55,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:55,473 INFO L93 Difference]: Finished difference Result 4070 states and 6271 transitions. [2021-11-12 22:29:55,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:29:55,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 2 states have call successors, (212), 2 states have call predecessors, (212), 2 states have return successors, (211), 2 states have call predecessors, (211), 2 states have call successors, (211) Word has length 910 [2021-11-12 22:29:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:55,531 INFO L225 Difference]: With dead ends: 4070 [2021-11-12 22:29:55,531 INFO L226 Difference]: Without dead ends: 2317 [2021-11-12 22:29:55,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:29:55,556 INFO L933 BasicCegarLoop]: 3491 mSDtfsCounter, 24 mSDsluCounter, 3469 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4179.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6936 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.36ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4284.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:55,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 6936 Invalid, 66 Unknown, 0 Unchecked, 40.36ms Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 2 Unknown, 0 Unchecked, 4284.39ms Time] [2021-11-12 22:29:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-11-12 22:29:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2317. [2021-11-12 22:29:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1329 states have (on average 1.1978931527464258) internal successors, (1592), 1333 states have internal predecessors, (1592), 966 states have call successors, (966), 21 states have call predecessors, (966), 21 states have return successors, (965), 963 states have call predecessors, (965), 965 states have call successors, (965) [2021-11-12 22:29:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3523 transitions. [2021-11-12 22:29:56,409 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3523 transitions. Word has length 910 [2021-11-12 22:29:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:56,415 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 3523 transitions. [2021-11-12 22:29:56,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 2 states have call successors, (212), 2 states have call predecessors, (212), 2 states have return successors, (211), 2 states have call predecessors, (211), 2 states have call successors, (211) [2021-11-12 22:29:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3523 transitions. [2021-11-12 22:29:56,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 917 [2021-11-12 22:29:56,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:56,465 INFO L514 BasicCegarLoop]: trace histogram [209, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:56,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:29:56,466 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:56,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1126916892, now seen corresponding path program 1 times [2021-11-12 22:29:56,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:29:56,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451067589] [2021-11-12 22:29:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:56,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:29:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43474 trivial. 0 not checked. [2021-11-12 22:29:57,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:29:57,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451067589] [2021-11-12 22:29:57,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451067589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:57,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:57,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:29:57,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730957975] [2021-11-12 22:29:57,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:57,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:29:57,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:29:57,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:29:57,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:29:57,693 INFO L87 Difference]: Start difference. First operand 2317 states and 3523 transitions. Second operand has 5 states, 4 states have (on average 70.0) internal successors, (280), 5 states have internal predecessors, (280), 4 states have call successors, (214), 2 states have call predecessors, (214), 2 states have return successors, (213), 3 states have call predecessors, (213), 4 states have call successors, (213) [2021-11-12 22:29:59,714 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:01,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:09,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:09,655 INFO L93 Difference]: Finished difference Result 4346 states and 6617 transitions. [2021-11-12 22:30:09,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:30:09,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 70.0) internal successors, (280), 5 states have internal predecessors, (280), 4 states have call successors, (214), 2 states have call predecessors, (214), 2 states have return successors, (213), 3 states have call predecessors, (213), 4 states have call successors, (213) Word has length 916 [2021-11-12 22:30:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:09,687 INFO L225 Difference]: With dead ends: 4346 [2021-11-12 22:30:09,688 INFO L226 Difference]: Without dead ends: 2597 [2021-11-12 22:30:09,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:30:09,700 INFO L933 BasicCegarLoop]: 3850 mSDtfsCounter, 3044 mSDsluCounter, 4812 mSDsCounter, 0 mSdLazyCounter, 2740 mSolverCounterSat, 35 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10472.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3044 SdHoareTripleChecker+Valid, 8608 SdHoareTripleChecker+Invalid, 2777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.90ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2740 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11514.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:09,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3044 Valid, 8608 Invalid, 2777 Unknown, 0 Unchecked, 61.90ms Time], IncrementalHoareTripleChecker [35 Valid, 2740 Invalid, 2 Unknown, 0 Unchecked, 11514.40ms Time] [2021-11-12 22:30:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-11-12 22:30:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2595. [2021-11-12 22:30:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 1531 states have (on average 1.2181580666231222) internal successors, (1865), 1535 states have internal predecessors, (1865), 1032 states have call successors, (1032), 31 states have call predecessors, (1032), 31 states have return successors, (1031), 1029 states have call predecessors, (1031), 1031 states have call successors, (1031) [2021-11-12 22:30:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 3928 transitions. [2021-11-12 22:30:10,299 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 3928 transitions. Word has length 916 [2021-11-12 22:30:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:10,302 INFO L470 AbstractCegarLoop]: Abstraction has 2595 states and 3928 transitions. [2021-11-12 22:30:10,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 70.0) internal successors, (280), 5 states have internal predecessors, (280), 4 states have call successors, (214), 2 states have call predecessors, (214), 2 states have return successors, (213), 3 states have call predecessors, (213), 4 states have call successors, (213) [2021-11-12 22:30:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 3928 transitions. [2021-11-12 22:30:10,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2021-11-12 22:30:10,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:10,318 INFO L514 BasicCegarLoop]: trace histogram [209, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:10,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:30:10,319 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1646070871, now seen corresponding path program 1 times [2021-11-12 22:30:10,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:30:10,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313891949] [2021-11-12 22:30:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:10,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:30:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43474 trivial. 0 not checked. [2021-11-12 22:30:11,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:30:11,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313891949] [2021-11-12 22:30:11,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313891949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:11,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:11,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:30:11,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657655012] [2021-11-12 22:30:11,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:11,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:30:11,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:30:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:30:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:30:11,193 INFO L87 Difference]: Start difference. First operand 2595 states and 3928 transitions. Second operand has 5 states, 4 states have (on average 70.5) internal successors, (282), 5 states have internal predecessors, (282), 4 states have call successors, (215), 2 states have call predecessors, (215), 2 states have return successors, (214), 3 states have call predecessors, (214), 4 states have call successors, (214) [2021-11-12 22:30:13,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:15,309 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:23,013 INFO L93 Difference]: Finished difference Result 4618 states and 7014 transitions. [2021-11-12 22:30:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:30:23,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 70.5) internal successors, (282), 5 states have internal predecessors, (282), 4 states have call successors, (215), 2 states have call predecessors, (215), 2 states have return successors, (214), 3 states have call predecessors, (214), 4 states have call successors, (214) Word has length 920 [2021-11-12 22:30:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:23,044 INFO L225 Difference]: With dead ends: 4618 [2021-11-12 22:30:23,045 INFO L226 Difference]: Without dead ends: 2593 [2021-11-12 22:30:23,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:30:23,058 INFO L933 BasicCegarLoop]: 3846 mSDtfsCounter, 3032 mSDsluCounter, 4810 mSDsCounter, 0 mSdLazyCounter, 2730 mSolverCounterSat, 32 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10087.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3032 SdHoareTripleChecker+Valid, 8602 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.13ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2730 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11457.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:23,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3032 Valid, 8602 Invalid, 2764 Unknown, 0 Unchecked, 46.13ms Time], IncrementalHoareTripleChecker [32 Valid, 2730 Invalid, 2 Unknown, 0 Unchecked, 11457.31ms Time] [2021-11-12 22:30:23,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2021-11-12 22:30:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2591. [2021-11-12 22:30:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 1529 states have (on average 1.2171353826030085) internal successors, (1861), 1533 states have internal predecessors, (1861), 1030 states have call successors, (1030), 31 states have call predecessors, (1030), 31 states have return successors, (1029), 1027 states have call predecessors, (1029), 1029 states have call successors, (1029) [2021-11-12 22:30:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 3920 transitions. [2021-11-12 22:30:23,547 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 3920 transitions. Word has length 920 [2021-11-12 22:30:23,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:23,549 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 3920 transitions. [2021-11-12 22:30:23,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 70.5) internal successors, (282), 5 states have internal predecessors, (282), 4 states have call successors, (215), 2 states have call predecessors, (215), 2 states have return successors, (214), 3 states have call predecessors, (214), 4 states have call successors, (214) [2021-11-12 22:30:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 3920 transitions. [2021-11-12 22:30:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2021-11-12 22:30:23,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:23,564 INFO L514 BasicCegarLoop]: trace histogram [209, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:23,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:30:23,564 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:23,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1555175291, now seen corresponding path program 1 times [2021-11-12 22:30:23,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:30:23,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667174813] [2021-11-12 22:30:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:23,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:30:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43474 trivial. 0 not checked. [2021-11-12 22:30:24,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:30:24,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667174813] [2021-11-12 22:30:24,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667174813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:24,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:24,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:30:24,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435005002] [2021-11-12 22:30:24,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:24,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:30:24,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:30:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:30:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:30:24,360 INFO L87 Difference]: Start difference. First operand 2591 states and 3920 transitions. Second operand has 6 states, 6 states have (on average 47.0) internal successors, (282), 5 states have internal predecessors, (282), 3 states have call successors, (215), 3 states have call predecessors, (215), 2 states have return successors, (214), 3 states have call predecessors, (214), 3 states have call successors, (214) [2021-11-12 22:30:26,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:30,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:45,686 INFO L93 Difference]: Finished difference Result 4528 states and 6866 transitions. [2021-11-12 22:30:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:30:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 47.0) internal successors, (282), 5 states have internal predecessors, (282), 3 states have call successors, (215), 3 states have call predecessors, (215), 2 states have return successors, (214), 3 states have call predecessors, (214), 3 states have call successors, (214) Word has length 920 [2021-11-12 22:30:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:45,727 INFO L225 Difference]: With dead ends: 4528 [2021-11-12 22:30:45,727 INFO L226 Difference]: Without dead ends: 4526 [2021-11-12 22:30:45,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:30:45,730 INFO L933 BasicCegarLoop]: 3373 mSDtfsCounter, 2527 mSDsluCounter, 9302 mSDsCounter, 0 mSdLazyCounter, 6035 mSolverCounterSat, 2060 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18123.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3192 SdHoareTripleChecker+Valid, 12655 SdHoareTripleChecker+Invalid, 8097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 117.31ms SdHoareTripleChecker+Time, 2060 IncrementalHoareTripleChecker+Valid, 6035 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20778.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:45,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3192 Valid, 12655 Invalid, 8097 Unknown, 0 Unchecked, 117.31ms Time], IncrementalHoareTripleChecker [2060 Valid, 6035 Invalid, 2 Unknown, 0 Unchecked, 20778.88ms Time] [2021-11-12 22:30:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4526 states. [2021-11-12 22:30:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4526 to 3657. [2021-11-12 22:30:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 2157 states have (on average 1.2174316179879463) internal successors, (2626), 2162 states have internal predecessors, (2626), 1456 states have call successors, (1456), 42 states have call predecessors, (1456), 43 states have return successors, (1478), 1453 states have call predecessors, (1478), 1454 states have call successors, (1478) [2021-11-12 22:30:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 5560 transitions. [2021-11-12 22:30:46,465 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 5560 transitions. Word has length 920 [2021-11-12 22:30:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:46,468 INFO L470 AbstractCegarLoop]: Abstraction has 3657 states and 5560 transitions. [2021-11-12 22:30:46,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.0) internal successors, (282), 5 states have internal predecessors, (282), 3 states have call successors, (215), 3 states have call predecessors, (215), 2 states have return successors, (214), 3 states have call predecessors, (214), 3 states have call successors, (214) [2021-11-12 22:30:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 5560 transitions. [2021-11-12 22:30:46,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 926 [2021-11-12 22:30:46,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:46,482 INFO L514 BasicCegarLoop]: trace histogram [209, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:46,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:30:46,483 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:46,483 INFO L85 PathProgramCache]: Analyzing trace with hash -588181326, now seen corresponding path program 1 times [2021-11-12 22:30:46,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:30:46,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855005504] [2021-11-12 22:30:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:46,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:30:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 43476 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 43474 trivial. 0 not checked. [2021-11-12 22:30:47,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:30:47,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855005504] [2021-11-12 22:30:47,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855005504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:47,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:47,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:30:47,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664896923] [2021-11-12 22:30:47,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:47,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:30:47,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:30:47,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:30:47,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:30:47,225 INFO L87 Difference]: Start difference. First operand 3657 states and 5560 transitions. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 4 states have internal predecessors, (285), 2 states have call successors, (216), 2 states have call predecessors, (216), 1 states have return successors, (215), 2 states have call predecessors, (215), 2 states have call successors, (215) [2021-11-12 22:30:49,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:51,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:52,057 INFO L93 Difference]: Finished difference Result 4160 states and 6315 transitions. [2021-11-12 22:30:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:30:52,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 4 states have internal predecessors, (285), 2 states have call successors, (216), 2 states have call predecessors, (216), 1 states have return successors, (215), 2 states have call predecessors, (215), 2 states have call successors, (215) Word has length 925 [2021-11-12 22:30:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:52,094 INFO L225 Difference]: With dead ends: 4160 [2021-11-12 22:30:52,094 INFO L226 Difference]: Without dead ends: 4133 [2021-11-12 22:30:52,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:30:52,097 INFO L933 BasicCegarLoop]: 3636 mSDtfsCounter, 2613 mSDsluCounter, 8874 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 47 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4487.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2636 SdHoareTripleChecker+Valid, 12444 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.09ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4635.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:52,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2636 Valid, 12444 Invalid, 254 Unknown, 0 Unchecked, 24.09ms Time], IncrementalHoareTripleChecker [47 Valid, 205 Invalid, 2 Unknown, 0 Unchecked, 4635.16ms Time] [2021-11-12 22:30:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-11-12 22:30:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 4106. [2021-11-12 22:30:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4106 states, 2442 states have (on average 1.2289107289107288) internal successors, (3001), 2473 states have internal predecessors, (3001), 1611 states have call successors, (1611), 50 states have call predecessors, (1611), 52 states have return successors, (1634), 1583 states have call predecessors, (1634), 1610 states have call successors, (1634) [2021-11-12 22:30:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 6246 transitions. [2021-11-12 22:30:52,827 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 6246 transitions. Word has length 925 [2021-11-12 22:30:52,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:52,829 INFO L470 AbstractCegarLoop]: Abstraction has 4106 states and 6246 transitions. [2021-11-12 22:30:52,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 4 states have internal predecessors, (285), 2 states have call successors, (216), 2 states have call predecessors, (216), 1 states have return successors, (215), 2 states have call predecessors, (215), 2 states have call successors, (215) [2021-11-12 22:30:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 6246 transitions. [2021-11-12 22:30:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 975 [2021-11-12 22:30:52,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:52,850 INFO L514 BasicCegarLoop]: trace histogram [214, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:52,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:30:52,850 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:52,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:52,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1540111967, now seen corresponding path program 1 times [2021-11-12 22:30:52,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:30:52,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209822643] [2021-11-12 22:30:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:52,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:30:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 45598 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 45594 trivial. 0 not checked. [2021-11-12 22:30:53,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:30:53,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209822643] [2021-11-12 22:30:53,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209822643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:53,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:53,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:30:53,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926896761] [2021-11-12 22:30:53,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:53,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:30:53,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:30:53,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:30:53,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:30:53,647 INFO L87 Difference]: Start difference. First operand 4106 states and 6246 transitions. Second operand has 5 states, 4 states have (on average 76.0) internal successors, (304), 5 states have internal predecessors, (304), 4 states have call successors, (225), 2 states have call predecessors, (225), 2 states have return successors, (224), 3 states have call predecessors, (224), 4 states have call successors, (224) [2021-11-12 22:30:55,674 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:57,747 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:05,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:05,522 INFO L93 Difference]: Finished difference Result 8464 states and 12809 transitions. [2021-11-12 22:31:05,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:31:05,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 76.0) internal successors, (304), 5 states have internal predecessors, (304), 4 states have call successors, (225), 2 states have call predecessors, (225), 2 states have return successors, (224), 3 states have call predecessors, (224), 4 states have call successors, (224) Word has length 974 [2021-11-12 22:31:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:05,591 INFO L225 Difference]: With dead ends: 8464 [2021-11-12 22:31:05,592 INFO L226 Difference]: Without dead ends: 4996 [2021-11-12 22:31:05,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:31:05,611 INFO L933 BasicCegarLoop]: 4307 mSDtfsCounter, 3966 mSDsluCounter, 4187 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 1204 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9800.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3966 SdHoareTripleChecker+Valid, 8426 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.28ms SdHoareTripleChecker+Time, 1204 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11509.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:05,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3966 Valid, 8426 Invalid, 2978 Unknown, 0 Unchecked, 32.28ms Time], IncrementalHoareTripleChecker [1204 Valid, 1772 Invalid, 2 Unknown, 0 Unchecked, 11509.14ms Time] [2021-11-12 22:31:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-11-12 22:31:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4987. [2021-11-12 22:31:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4987 states, 3070 states have (on average 1.2501628664495115) internal successors, (3838), 3105 states have internal predecessors, (3838), 1829 states have call successors, (1829), 84 states have call predecessors, (1829), 87 states have return successors, (1852), 1799 states have call predecessors, (1852), 1828 states have call successors, (1852) [2021-11-12 22:31:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4987 states to 4987 states and 7519 transitions. [2021-11-12 22:31:06,407 INFO L78 Accepts]: Start accepts. Automaton has 4987 states and 7519 transitions. Word has length 974 [2021-11-12 22:31:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:06,409 INFO L470 AbstractCegarLoop]: Abstraction has 4987 states and 7519 transitions. [2021-11-12 22:31:06,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 76.0) internal successors, (304), 5 states have internal predecessors, (304), 4 states have call successors, (225), 2 states have call predecessors, (225), 2 states have return successors, (224), 3 states have call predecessors, (224), 4 states have call successors, (224) [2021-11-12 22:31:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4987 states and 7519 transitions. [2021-11-12 22:31:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2021-11-12 22:31:06,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:06,431 INFO L514 BasicCegarLoop]: trace histogram [210, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:06,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:31:06,432 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:06,433 INFO L85 PathProgramCache]: Analyzing trace with hash -514484076, now seen corresponding path program 1 times [2021-11-12 22:31:06,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:31:06,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490407612] [2021-11-12 22:31:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:06,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:31:06,672 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:31:06,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050417066] [2021-11-12 22:31:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:06,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:06,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:06,676 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:06,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:31:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:07,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 3235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:31:07,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 43900 backedges. 832 proven. 0 refuted. 0 times theorem prover too weak. 43068 trivial. 0 not checked. [2021-11-12 22:31:10,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 43900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43900 trivial. 0 not checked. [2021-11-12 22:31:12,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:31:12,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490407612] [2021-11-12 22:31:12,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:31:12,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050417066] [2021-11-12 22:31:12,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050417066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:12,592 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:31:12,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-12 22:31:12,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588426011] [2021-11-12 22:31:12,593 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:12,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:31:12,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:31:12,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:31:12,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:31:12,598 INFO L87 Difference]: Start difference. First operand 4987 states and 7519 transitions. Second operand has 8 states, 8 states have (on average 41.75) internal successors, (334), 8 states have internal predecessors, (334), 3 states have call successors, (235), 3 states have call predecessors, (235), 4 states have return successors, (234), 3 states have call predecessors, (234), 3 states have call successors, (234) [2021-11-12 22:31:14,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:16,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:32,791 INFO L93 Difference]: Finished difference Result 9347 states and 14145 transitions. [2021-11-12 22:31:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:31:32,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 41.75) internal successors, (334), 8 states have internal predecessors, (334), 3 states have call successors, (235), 3 states have call predecessors, (235), 4 states have return successors, (234), 3 states have call predecessors, (234), 3 states have call successors, (234) Word has length 973 [2021-11-12 22:31:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:32,834 INFO L225 Difference]: With dead ends: 9347 [2021-11-12 22:31:32,834 INFO L226 Difference]: Without dead ends: 4987 [2021-11-12 22:31:32,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1946 GetRequests, 1938 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:31:32,854 INFO L933 BasicCegarLoop]: 3833 mSDtfsCounter, 3808 mSDsluCounter, 9364 mSDsCounter, 0 mSdLazyCounter, 6052 mSolverCounterSat, 992 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16844.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3811 SdHoareTripleChecker+Valid, 13078 SdHoareTripleChecker+Invalid, 7046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.09ms SdHoareTripleChecker+Time, 992 IncrementalHoareTripleChecker+Valid, 6052 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19760.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:32,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3811 Valid, 13078 Invalid, 7046 Unknown, 0 Unchecked, 48.09ms Time], IncrementalHoareTripleChecker [992 Valid, 6052 Invalid, 2 Unknown, 0 Unchecked, 19760.98ms Time] [2021-11-12 22:31:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-11-12 22:31:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 4983. [2021-11-12 22:31:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4983 states, 3068 states have (on average 1.2490221642764017) internal successors, (3832), 3103 states have internal predecessors, (3832), 1827 states have call successors, (1827), 84 states have call predecessors, (1827), 87 states have return successors, (1850), 1797 states have call predecessors, (1850), 1826 states have call successors, (1850) [2021-11-12 22:31:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4983 states to 4983 states and 7509 transitions. [2021-11-12 22:31:33,617 INFO L78 Accepts]: Start accepts. Automaton has 4983 states and 7509 transitions. Word has length 973 [2021-11-12 22:31:33,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:33,619 INFO L470 AbstractCegarLoop]: Abstraction has 4983 states and 7509 transitions. [2021-11-12 22:31:33,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 41.75) internal successors, (334), 8 states have internal predecessors, (334), 3 states have call successors, (235), 3 states have call predecessors, (235), 4 states have return successors, (234), 3 states have call predecessors, (234), 3 states have call successors, (234) [2021-11-12 22:31:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4983 states and 7509 transitions. [2021-11-12 22:31:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 979 [2021-11-12 22:31:33,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:33,643 INFO L514 BasicCegarLoop]: trace histogram [214, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:33,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:33,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:33,857 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:33,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1063773288, now seen corresponding path program 1 times [2021-11-12 22:31:33,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:31:33,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519338917] [2021-11-12 22:31:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:33,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:31:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 45598 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 45589 trivial. 0 not checked. [2021-11-12 22:31:34,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:31:34,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519338917] [2021-11-12 22:31:34,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519338917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:34,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:31:34,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:31:34,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860460114] [2021-11-12 22:31:34,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:34,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:31:34,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:31:34,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:31:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:31:34,629 INFO L87 Difference]: Start difference. First operand 4983 states and 7509 transitions. Second operand has 6 states, 6 states have (on average 51.666666666666664) internal successors, (310), 6 states have internal predecessors, (310), 3 states have call successors, (226), 2 states have call predecessors, (226), 4 states have return successors, (225), 3 states have call predecessors, (225), 3 states have call successors, (225) [2021-11-12 22:31:36,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:38,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:49,499 INFO L93 Difference]: Finished difference Result 8698 states and 13154 transitions. [2021-11-12 22:31:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:31:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 51.666666666666664) internal successors, (310), 6 states have internal predecessors, (310), 3 states have call successors, (226), 2 states have call predecessors, (226), 4 states have return successors, (225), 3 states have call predecessors, (225), 3 states have call successors, (225) Word has length 978 [2021-11-12 22:31:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:49,529 INFO L225 Difference]: With dead ends: 8698 [2021-11-12 22:31:49,529 INFO L226 Difference]: Without dead ends: 4977 [2021-11-12 22:31:49,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:31:49,549 INFO L933 BasicCegarLoop]: 3857 mSDtfsCounter, 3048 mSDsluCounter, 6324 mSDsCounter, 0 mSdLazyCounter, 3425 mSolverCounterSat, 32 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12259.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3048 SdHoareTripleChecker+Valid, 10107 SdHoareTripleChecker+Invalid, 3459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.56ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3425 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14477.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:49,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3048 Valid, 10107 Invalid, 3459 Unknown, 0 Unchecked, 32.56ms Time], IncrementalHoareTripleChecker [32 Valid, 3425 Invalid, 2 Unknown, 0 Unchecked, 14477.45ms Time] [2021-11-12 22:31:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2021-11-12 22:31:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4977. [2021-11-12 22:31:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4977 states, 3064 states have (on average 1.2483681462140992) internal successors, (3825), 3099 states have internal predecessors, (3825), 1825 states have call successors, (1825), 84 states have call predecessors, (1825), 87 states have return successors, (1848), 1795 states have call predecessors, (1848), 1824 states have call successors, (1848) [2021-11-12 22:31:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4977 states to 4977 states and 7498 transitions. [2021-11-12 22:31:50,306 INFO L78 Accepts]: Start accepts. Automaton has 4977 states and 7498 transitions. Word has length 978 [2021-11-12 22:31:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:50,307 INFO L470 AbstractCegarLoop]: Abstraction has 4977 states and 7498 transitions. [2021-11-12 22:31:50,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.666666666666664) internal successors, (310), 6 states have internal predecessors, (310), 3 states have call successors, (226), 2 states have call predecessors, (226), 4 states have return successors, (225), 3 states have call predecessors, (225), 3 states have call successors, (225) [2021-11-12 22:31:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4977 states and 7498 transitions. [2021-11-12 22:31:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2021-11-12 22:31:50,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:50,330 INFO L514 BasicCegarLoop]: trace histogram [214, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:50,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:31:50,330 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:50,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1736806939, now seen corresponding path program 1 times [2021-11-12 22:31:50,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:31:50,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139062862] [2021-11-12 22:31:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:50,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:31:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 45598 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45590 trivial. 0 not checked. [2021-11-12 22:31:51,198 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:31:51,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139062862] [2021-11-12 22:31:51,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139062862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:51,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:31:51,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:31:51,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055566349] [2021-11-12 22:31:51,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:51,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:31:51,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:31:51,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:31:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:31:51,204 INFO L87 Difference]: Start difference. First operand 4977 states and 7498 transitions. Second operand has 6 states, 6 states have (on average 51.666666666666664) internal successors, (310), 6 states have internal predecessors, (310), 3 states have call successors, (226), 2 states have call predecessors, (226), 4 states have return successors, (225), 3 states have call predecessors, (225), 3 states have call successors, (225) [2021-11-12 22:31:53,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:55,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:05,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:05,951 INFO L93 Difference]: Finished difference Result 8693 states and 13137 transitions. [2021-11-12 22:32:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:32:05,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 51.666666666666664) internal successors, (310), 6 states have internal predecessors, (310), 3 states have call successors, (226), 2 states have call predecessors, (226), 4 states have return successors, (225), 3 states have call predecessors, (225), 3 states have call successors, (225) Word has length 979 [2021-11-12 22:32:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:05,989 INFO L225 Difference]: With dead ends: 8693 [2021-11-12 22:32:05,989 INFO L226 Difference]: Without dead ends: 4978 [2021-11-12 22:32:06,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:32:06,006 INFO L933 BasicCegarLoop]: 3823 mSDtfsCounter, 3438 mSDsluCounter, 4431 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 403 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11692.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3438 SdHoareTripleChecker+Valid, 8211 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.42ms SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14368.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:06,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3438 Valid, 8211 Invalid, 2510 Unknown, 0 Unchecked, 29.42ms Time], IncrementalHoareTripleChecker [403 Valid, 2105 Invalid, 2 Unknown, 0 Unchecked, 14368.59ms Time] [2021-11-12 22:32:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4978 states. [2021-11-12 22:32:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4978 to 4976. [2021-11-12 22:32:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4976 states, 3063 states have (on average 1.248122755468495) internal successors, (3823), 3098 states have internal predecessors, (3823), 1825 states have call successors, (1825), 84 states have call predecessors, (1825), 87 states have return successors, (1848), 1795 states have call predecessors, (1848), 1824 states have call successors, (1848) [2021-11-12 22:32:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4976 states to 4976 states and 7496 transitions. [2021-11-12 22:32:06,614 INFO L78 Accepts]: Start accepts. Automaton has 4976 states and 7496 transitions. Word has length 979 [2021-11-12 22:32:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:06,616 INFO L470 AbstractCegarLoop]: Abstraction has 4976 states and 7496 transitions. [2021-11-12 22:32:06,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.666666666666664) internal successors, (310), 6 states have internal predecessors, (310), 3 states have call successors, (226), 2 states have call predecessors, (226), 4 states have return successors, (225), 3 states have call predecessors, (225), 3 states have call successors, (225) [2021-11-12 22:32:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4976 states and 7496 transitions. [2021-11-12 22:32:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2021-11-12 22:32:06,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:06,636 INFO L514 BasicCegarLoop]: trace histogram [210, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:32:06,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:32:06,637 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:32:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:06,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1868626377, now seen corresponding path program 1 times [2021-11-12 22:32:06,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:32:06,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132811003] [2021-11-12 22:32:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:06,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:32:06,820 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:32:06,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59085142] [2021-11-12 22:32:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:06,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:32:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:32:06,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:32:06,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 22:32:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:07,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 3247 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:32:07,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 43900 backedges. 832 proven. 0 refuted. 0 times theorem prover too weak. 43068 trivial. 0 not checked. [2021-11-12 22:32:09,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 43900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43900 trivial. 0 not checked. [2021-11-12 22:32:12,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:32:12,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132811003] [2021-11-12 22:32:12,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:32:12,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59085142] [2021-11-12 22:32:12,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59085142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:32:12,924 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:32:12,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-12 22:32:12,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873916330] [2021-11-12 22:32:12,924 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:32:12,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:32:12,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:32:12,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:32:12,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:32:12,929 INFO L87 Difference]: Start difference. First operand 4976 states and 7496 transitions. Second operand has 8 states, 8 states have (on average 42.25) internal successors, (338), 8 states have internal predecessors, (338), 4 states have call successors, (237), 3 states have call predecessors, (237), 4 states have return successors, (236), 4 states have call predecessors, (236), 4 states have call successors, (236) [2021-11-12 22:32:14,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:17,069 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:29,650 INFO L93 Difference]: Finished difference Result 9321 states and 14094 transitions. [2021-11-12 22:32:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:32:29,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 42.25) internal successors, (338), 8 states have internal predecessors, (338), 4 states have call successors, (237), 3 states have call predecessors, (237), 4 states have return successors, (236), 4 states have call predecessors, (236), 4 states have call successors, (236) Word has length 977 [2021-11-12 22:32:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:29,681 INFO L225 Difference]: With dead ends: 9321 [2021-11-12 22:32:29,681 INFO L226 Difference]: Without dead ends: 4970 [2021-11-12 22:32:29,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1954 GetRequests, 1946 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:32:29,697 INFO L933 BasicCegarLoop]: 3848 mSDtfsCounter, 4498 mSDsluCounter, 4146 mSDsCounter, 0 mSdLazyCounter, 3022 mSolverCounterSat, 1620 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13342.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4498 SdHoareTripleChecker+Valid, 7936 SdHoareTripleChecker+Invalid, 4644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.69ms SdHoareTripleChecker+Time, 1620 IncrementalHoareTripleChecker+Valid, 3022 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16264.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:29,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4498 Valid, 7936 Invalid, 4644 Unknown, 0 Unchecked, 34.69ms Time], IncrementalHoareTripleChecker [1620 Valid, 3022 Invalid, 2 Unknown, 0 Unchecked, 16264.20ms Time] [2021-11-12 22:32:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2021-11-12 22:32:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 4970. [2021-11-12 22:32:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4970 states, 3060 states have (on average 1.2473856209150327) internal successors, (3817), 3095 states have internal predecessors, (3817), 1822 states have call successors, (1822), 84 states have call predecessors, (1822), 87 states have return successors, (1845), 1792 states have call predecessors, (1845), 1821 states have call successors, (1845) [2021-11-12 22:32:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 7484 transitions. [2021-11-12 22:32:30,453 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 7484 transitions. Word has length 977 [2021-11-12 22:32:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:30,455 INFO L470 AbstractCegarLoop]: Abstraction has 4970 states and 7484 transitions. [2021-11-12 22:32:30,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 42.25) internal successors, (338), 8 states have internal predecessors, (338), 4 states have call successors, (237), 3 states have call predecessors, (237), 4 states have return successors, (236), 4 states have call predecessors, (236), 4 states have call successors, (236) [2021-11-12 22:32:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 7484 transitions. [2021-11-12 22:32:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2021-11-12 22:32:30,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:30,477 INFO L514 BasicCegarLoop]: trace histogram [210, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:32:30,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:30,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-12 22:32:30,693 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:32:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:30,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1864278619, now seen corresponding path program 1 times [2021-11-12 22:32:30,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:32:30,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705492950] [2021-11-12 22:32:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:30,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:32:30,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:32:30,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761777260] [2021-11-12 22:32:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:30,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:32:30,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:32:30,910 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:32:30,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 22:32:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:32,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 3246 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:32:32,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 43902 backedges. 836 proven. 0 refuted. 0 times theorem prover too weak. 43066 trivial. 0 not checked. [2021-11-12 22:32:34,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 43902 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 43899 trivial. 0 not checked. [2021-11-12 22:32:36,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:32:36,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705492950] [2021-11-12 22:32:36,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:32:36,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761777260] [2021-11-12 22:32:36,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761777260] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:32:36,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:32:36,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-11-12 22:32:37,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389518531] [2021-11-12 22:32:37,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:32:37,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:32:37,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:32:37,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:32:37,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:32:37,003 INFO L87 Difference]: Start difference. First operand 4970 states and 7484 transitions. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 3 states have call successors, (224), 3 states have call predecessors, (224), 3 states have return successors, (223), 3 states have call predecessors, (223), 3 states have call successors, (223) [2021-11-12 22:32:39,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:41,111 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:50,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:50,820 INFO L93 Difference]: Finished difference Result 9288 states and 14043 transitions. [2021-11-12 22:32:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:32:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 3 states have call successors, (224), 3 states have call predecessors, (224), 3 states have return successors, (223), 3 states have call predecessors, (223), 3 states have call successors, (223) Word has length 977 [2021-11-12 22:32:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:50,851 INFO L225 Difference]: With dead ends: 9288 [2021-11-12 22:32:50,852 INFO L226 Difference]: Without dead ends: 4972 [2021-11-12 22:32:50,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1953 GetRequests, 1946 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:32:50,947 INFO L933 BasicCegarLoop]: 3527 mSDtfsCounter, 1716 mSDsluCounter, 7266 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 29 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11017.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 10721 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.17ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13451.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:50,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1719 Valid, 10721 Invalid, 2167 Unknown, 0 Unchecked, 27.17ms Time], IncrementalHoareTripleChecker [29 Valid, 2136 Invalid, 2 Unknown, 0 Unchecked, 13451.57ms Time] [2021-11-12 22:32:50,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2021-11-12 22:32:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 4970. [2021-11-12 22:32:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4970 states, 3060 states have (on average 1.246078431372549) internal successors, (3813), 3095 states have internal predecessors, (3813), 1822 states have call successors, (1822), 84 states have call predecessors, (1822), 87 states have return successors, (1845), 1792 states have call predecessors, (1845), 1821 states have call successors, (1845) [2021-11-12 22:32:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 7480 transitions. [2021-11-12 22:32:51,685 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 7480 transitions. Word has length 977 [2021-11-12 22:32:51,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:51,687 INFO L470 AbstractCegarLoop]: Abstraction has 4970 states and 7480 transitions. [2021-11-12 22:32:51,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 3 states have call successors, (224), 3 states have call predecessors, (224), 3 states have return successors, (223), 3 states have call predecessors, (223), 3 states have call successors, (223) [2021-11-12 22:32:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 7480 transitions. [2021-11-12 22:32:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2021-11-12 22:32:51,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:51,709 INFO L514 BasicCegarLoop]: trace histogram [214, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:32:51,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:51,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:32:51,925 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:32:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1698788523, now seen corresponding path program 1 times [2021-11-12 22:32:51,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:32:51,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530898095] [2021-11-12 22:32:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:51,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:32:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 45601 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 45595 trivial. 0 not checked. [2021-11-12 22:32:52,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:32:52,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530898095] [2021-11-12 22:32:52,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530898095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:32:52,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838843221] [2021-11-12 22:32:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:52,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:32:52,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:32:52,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:32:52,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 22:32:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:53,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 3171 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:32:53,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 45601 backedges. 2099 proven. 0 refuted. 0 times theorem prover too weak. 43502 trivial. 0 not checked. [2021-11-12 22:32:56,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 45601 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 45597 trivial. 0 not checked. [2021-11-12 22:32:58,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838843221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:32:58,692 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:32:58,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [7] total 18 [2021-11-12 22:32:58,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718229093] [2021-11-12 22:32:58,694 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:32:58,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:32:58,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:32:58,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:32:58,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:32:58,698 INFO L87 Difference]: Start difference. First operand 4970 states and 7480 transitions. Second operand has 13 states, 12 states have (on average 28.083333333333332) internal successors, (337), 11 states have internal predecessors, (337), 6 states have call successors, (238), 5 states have call predecessors, (238), 4 states have return successors, (236), 5 states have call predecessors, (236), 6 states have call successors, (236) [2021-11-12 22:33:00,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:02,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:35,960 INFO L93 Difference]: Finished difference Result 7045 states and 10592 transitions. [2021-11-12 22:33:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:33:35,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 28.083333333333332) internal successors, (337), 11 states have internal predecessors, (337), 6 states have call successors, (238), 5 states have call predecessors, (238), 4 states have return successors, (236), 5 states have call predecessors, (236), 6 states have call successors, (236) Word has length 984 [2021-11-12 22:33:35,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:36,001 INFO L225 Difference]: With dead ends: 7045 [2021-11-12 22:33:36,001 INFO L226 Difference]: Without dead ends: 7043 [2021-11-12 22:33:36,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1980 GetRequests, 1958 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:33:36,007 INFO L933 BasicCegarLoop]: 5709 mSDtfsCounter, 8526 mSDsluCounter, 27812 mSDsCounter, 0 mSdLazyCounter, 7238 mSolverCounterSat, 2978 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28366.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8665 SdHoareTripleChecker+Valid, 33199 SdHoareTripleChecker+Invalid, 10218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 122.93ms SdHoareTripleChecker+Time, 2978 IncrementalHoareTripleChecker+Valid, 7238 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36213.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:36,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8665 Valid, 33199 Invalid, 10218 Unknown, 0 Unchecked, 122.93ms Time], IncrementalHoareTripleChecker [2978 Valid, 7238 Invalid, 2 Unknown, 0 Unchecked, 36213.95ms Time] [2021-11-12 22:33:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7043 states. [2021-11-12 22:33:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7043 to 6994. [2021-11-12 22:33:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6994 states, 4262 states have (on average 1.2381511027686531) internal successors, (5277), 4301 states have internal predecessors, (5277), 2613 states have call successors, (2613), 114 states have call predecessors, (2613), 118 states have return successors, (2655), 2581 states have call predecessors, (2655), 2611 states have call successors, (2655) [2021-11-12 22:33:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6994 states to 6994 states and 10545 transitions. [2021-11-12 22:33:37,295 INFO L78 Accepts]: Start accepts. Automaton has 6994 states and 10545 transitions. Word has length 984 [2021-11-12 22:33:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:37,297 INFO L470 AbstractCegarLoop]: Abstraction has 6994 states and 10545 transitions. [2021-11-12 22:33:37,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 28.083333333333332) internal successors, (337), 11 states have internal predecessors, (337), 6 states have call successors, (238), 5 states have call predecessors, (238), 4 states have return successors, (236), 5 states have call predecessors, (236), 6 states have call successors, (236) [2021-11-12 22:33:37,298 INFO L276 IsEmpty]: Start isEmpty. Operand 6994 states and 10545 transitions. [2021-11-12 22:33:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 986 [2021-11-12 22:33:37,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:37,321 INFO L514 BasicCegarLoop]: trace histogram [210, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:33:37,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-12 22:33:37,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:33:37,545 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:37,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2103787237, now seen corresponding path program 1 times [2021-11-12 22:33:37,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:33:37,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388896352] [2021-11-12 22:33:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:37,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:33:37,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:33:37,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58064704] [2021-11-12 22:33:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:37,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:33:37,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:33:37,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:33:37,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 22:33:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:38,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 3270 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:33:38,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 43906 backedges. 834 proven. 0 refuted. 0 times theorem prover too weak. 43072 trivial. 0 not checked. [2021-11-12 22:33:40,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 43906 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 43901 trivial. 0 not checked. [2021-11-12 22:33:42,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:33:42,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388896352] [2021-11-12 22:33:42,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:33:42,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58064704] [2021-11-12 22:33:42,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58064704] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:33:42,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:33:42,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-11-12 22:33:42,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319601466] [2021-11-12 22:33:42,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:42,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:33:42,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:33:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:33:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:33:42,733 INFO L87 Difference]: Start difference. First operand 6994 states and 10545 transitions. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 3 states have call successors, (225), 3 states have call predecessors, (225), 3 states have return successors, (224), 3 states have call predecessors, (224), 3 states have call successors, (224) [2021-11-12 22:33:44,765 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:46,845 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:59,121 INFO L93 Difference]: Finished difference Result 13324 states and 20194 transitions. [2021-11-12 22:33:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:33:59,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 3 states have call successors, (225), 3 states have call predecessors, (225), 3 states have return successors, (224), 3 states have call predecessors, (224), 3 states have call successors, (224) Word has length 985 [2021-11-12 22:33:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:59,164 INFO L225 Difference]: With dead ends: 13324 [2021-11-12 22:33:59,164 INFO L226 Difference]: Without dead ends: 6982 [2021-11-12 22:33:59,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1969 GetRequests, 1962 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:33:59,190 INFO L933 BasicCegarLoop]: 3551 mSDtfsCounter, 2182 mSDsluCounter, 5005 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 26 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12860.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2183 SdHoareTripleChecker+Valid, 8491 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.69ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15906.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:59,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2183 Valid, 8491 Invalid, 2673 Unknown, 0 Unchecked, 26.69ms Time], IncrementalHoareTripleChecker [26 Valid, 2645 Invalid, 2 Unknown, 0 Unchecked, 15906.88ms Time] [2021-11-12 22:33:59,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2021-11-12 22:34:00,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 6982. [2021-11-12 22:34:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6982 states, 4256 states have (on average 1.237077067669173) internal successors, (5265), 4295 states have internal predecessors, (5265), 2607 states have call successors, (2607), 114 states have call predecessors, (2607), 118 states have return successors, (2649), 2575 states have call predecessors, (2649), 2605 states have call successors, (2649) [2021-11-12 22:34:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 10521 transitions. [2021-11-12 22:34:00,337 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 10521 transitions. Word has length 985 [2021-11-12 22:34:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:00,339 INFO L470 AbstractCegarLoop]: Abstraction has 6982 states and 10521 transitions. [2021-11-12 22:34:00,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 3 states have call successors, (225), 3 states have call predecessors, (225), 3 states have return successors, (224), 3 states have call predecessors, (224), 3 states have call successors, (224) [2021-11-12 22:34:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 10521 transitions. [2021-11-12 22:34:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 986 [2021-11-12 22:34:00,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:00,360 INFO L514 BasicCegarLoop]: trace histogram [210, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:00,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-12 22:34:00,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-12 22:34:00,585 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:00,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:00,586 INFO L85 PathProgramCache]: Analyzing trace with hash -858393957, now seen corresponding path program 1 times [2021-11-12 22:34:00,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:00,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003843264] [2021-11-12 22:34:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:00,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:00,785 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:34:00,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030476347] [2021-11-12 22:34:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:00,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:00,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:00,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:34:00,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 22:34:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:01,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 3268 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:34:01,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 43914 backedges. 846 proven. 0 refuted. 0 times theorem prover too weak. 43068 trivial. 0 not checked. [2021-11-12 22:34:03,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 43914 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43914 trivial. 0 not checked. [2021-11-12 22:34:06,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:06,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003843264] [2021-11-12 22:34:06,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:34:06,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030476347] [2021-11-12 22:34:06,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030476347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:06,216 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:06,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-12 22:34:06,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508167976] [2021-11-12 22:34:06,217 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:06,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:34:06,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:34:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:34:06,220 INFO L87 Difference]: Start difference. First operand 6982 states and 10521 transitions. Second operand has 8 states, 8 states have (on average 43.125) internal successors, (345), 8 states have internal predecessors, (345), 3 states have call successors, (240), 3 states have call predecessors, (240), 4 states have return successors, (239), 3 states have call predecessors, (239), 3 states have call successors, (239) [2021-11-12 22:34:08,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:10,310 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:30,812 INFO L93 Difference]: Finished difference Result 13197 states and 19988 transitions. [2021-11-12 22:34:30,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:34:30,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 43.125) internal successors, (345), 8 states have internal predecessors, (345), 3 states have call successors, (240), 3 states have call predecessors, (240), 4 states have return successors, (239), 3 states have call predecessors, (239), 3 states have call successors, (239) Word has length 985 [2021-11-12 22:34:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:30,846 INFO L225 Difference]: With dead ends: 13197 [2021-11-12 22:34:30,847 INFO L226 Difference]: Without dead ends: 6984 [2021-11-12 22:34:30,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1969 GetRequests, 1962 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:34:30,871 INFO L933 BasicCegarLoop]: 3819 mSDtfsCounter, 3640 mSDsluCounter, 5419 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 672 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18417.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3643 SdHoareTripleChecker+Valid, 9170 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.22ms SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24053.35ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:30,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3643 Valid, 9170 Invalid, 4053 Unknown, 0 Unchecked, 34.22ms Time], IncrementalHoareTripleChecker [672 Valid, 3379 Invalid, 2 Unknown, 0 Unchecked, 24053.35ms Time] [2021-11-12 22:34:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6984 states. [2021-11-12 22:34:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6984 to 6982. [2021-11-12 22:34:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6982 states, 4256 states have (on average 1.2356672932330828) internal successors, (5259), 4295 states have internal predecessors, (5259), 2607 states have call successors, (2607), 114 states have call predecessors, (2607), 118 states have return successors, (2649), 2575 states have call predecessors, (2649), 2605 states have call successors, (2649) [2021-11-12 22:34:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 10515 transitions. [2021-11-12 22:34:31,958 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 10515 transitions. Word has length 985 [2021-11-12 22:34:31,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:31,960 INFO L470 AbstractCegarLoop]: Abstraction has 6982 states and 10515 transitions. [2021-11-12 22:34:31,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 43.125) internal successors, (345), 8 states have internal predecessors, (345), 3 states have call successors, (240), 3 states have call predecessors, (240), 4 states have return successors, (239), 3 states have call predecessors, (239), 3 states have call successors, (239) [2021-11-12 22:34:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 10515 transitions. [2021-11-12 22:34:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2021-11-12 22:34:31,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:31,983 INFO L514 BasicCegarLoop]: trace histogram [214, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:32,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:32,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-12 22:34:32,209 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1049003544, now seen corresponding path program 1 times [2021-11-12 22:34:32,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:32,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113833792] [2021-11-12 22:34:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:32,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 45611 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 45603 trivial. 0 not checked. [2021-11-12 22:34:33,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:33,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113833792] [2021-11-12 22:34:33,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113833792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:34:33,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181155082] [2021-11-12 22:34:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:33,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:33,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:33,108 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:34:33,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 22:34:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:34,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:34:34,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 45611 backedges. 2107 proven. 2 refuted. 0 times theorem prover too weak. 43502 trivial. 0 not checked. [2021-11-12 22:34:35,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 45611 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 45605 trivial. 0 not checked. [2021-11-12 22:34:38,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181155082] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:34:38,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:34:38,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7] total 18 [2021-11-12 22:34:38,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107241619] [2021-11-12 22:34:38,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:38,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:34:38,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:38,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:34:38,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:34:38,597 INFO L87 Difference]: Start difference. First operand 6982 states and 10515 transitions. Second operand has 8 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 4 states have call successors, (228), 2 states have call predecessors, (228), 2 states have return successors, (227), 3 states have call predecessors, (227), 4 states have call successors, (227) [2021-11-12 22:34:40,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:42,707 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:35:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:04,133 INFO L93 Difference]: Finished difference Result 9825 states and 14749 transitions. [2021-11-12 22:35:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:35:04,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 4 states have call successors, (228), 2 states have call predecessors, (228), 2 states have return successors, (227), 3 states have call predecessors, (227), 4 states have call successors, (227) Word has length 989 [2021-11-12 22:35:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:04,163 INFO L225 Difference]: With dead ends: 9825 [2021-11-12 22:35:04,163 INFO L226 Difference]: Without dead ends: 9823 [2021-11-12 22:35:04,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1988 GetRequests, 1968 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:35:04,168 INFO L933 BasicCegarLoop]: 4389 mSDtfsCounter, 6775 mSDsluCounter, 14444 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 2806 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18652.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6848 SdHoareTripleChecker+Valid, 18641 SdHoareTripleChecker+Invalid, 4678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 60.09ms SdHoareTripleChecker+Time, 2806 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24716.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:04,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6848 Valid, 18641 Invalid, 4678 Unknown, 0 Unchecked, 60.09ms Time], IncrementalHoareTripleChecker [2806 Valid, 1870 Invalid, 2 Unknown, 0 Unchecked, 24716.41ms Time] [2021-11-12 22:35:04,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9823 states. [2021-11-12 22:35:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9823 to 9803. [2021-11-12 22:35:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9803 states, 6010 states have (on average 1.2346089850249584) internal successors, (7420), 6032 states have internal predecessors, (7420), 3617 states have call successors, (3617), 169 states have call predecessors, (3617), 175 states have return successors, (3682), 3606 states have call predecessors, (3682), 3615 states have call successors, (3682) [2021-11-12 22:35:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9803 states to 9803 states and 14719 transitions. [2021-11-12 22:35:05,392 INFO L78 Accepts]: Start accepts. Automaton has 9803 states and 14719 transitions. Word has length 989 [2021-11-12 22:35:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:05,393 INFO L470 AbstractCegarLoop]: Abstraction has 9803 states and 14719 transitions. [2021-11-12 22:35:05,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 44.0) internal successors, (308), 7 states have internal predecessors, (308), 4 states have call successors, (228), 2 states have call predecessors, (228), 2 states have return successors, (227), 3 states have call predecessors, (227), 4 states have call successors, (227) [2021-11-12 22:35:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 9803 states and 14719 transitions. [2021-11-12 22:35:05,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2021-11-12 22:35:05,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:05,407 INFO L514 BasicCegarLoop]: trace histogram [210, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:05,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:05,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:05,608 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:05,609 INFO L85 PathProgramCache]: Analyzing trace with hash 582320251, now seen corresponding path program 1 times [2021-11-12 22:35:05,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:05,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911472281] [2021-11-12 22:35:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:05,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:05,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:35:05,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040117813] [2021-11-12 22:35:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:05,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:05,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:05,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:05,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 22:35:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:06,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:35:06,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 43914 backedges. 846 proven. 0 refuted. 0 times theorem prover too weak. 43068 trivial. 0 not checked. [2021-11-12 22:35:08,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 43914 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43914 trivial. 0 not checked. [2021-11-12 22:35:11,114 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:11,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911472281] [2021-11-12 22:35:11,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:35:11,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040117813] [2021-11-12 22:35:11,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040117813] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:11,114 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:11,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-12 22:35:11,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537511965] [2021-11-12 22:35:11,115 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:11,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:35:11,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:11,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:35:11,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:35:11,117 INFO L87 Difference]: Start difference. First operand 9803 states and 14719 transitions. Second operand has 8 states, 8 states have (on average 43.625) internal successors, (349), 8 states have internal predecessors, (349), 4 states have call successors, (242), 3 states have call predecessors, (242), 4 states have return successors, (241), 4 states have call predecessors, (241), 4 states have call successors, (241) [2021-11-12 22:35:13,199 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:35:15,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:35:41,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:41,104 INFO L93 Difference]: Finished difference Result 18363 states and 27725 transitions. [2021-11-12 22:35:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:35:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 43.625) internal successors, (349), 8 states have internal predecessors, (349), 4 states have call successors, (242), 3 states have call predecessors, (242), 4 states have return successors, (241), 4 states have call predecessors, (241), 4 states have call successors, (241) Word has length 989 [2021-11-12 22:35:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:41,136 INFO L225 Difference]: With dead ends: 18363 [2021-11-12 22:35:41,136 INFO L226 Difference]: Without dead ends: 9213 [2021-11-12 22:35:41,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1978 GetRequests, 1970 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:35:41,156 INFO L933 BasicCegarLoop]: 3838 mSDtfsCounter, 3009 mSDsluCounter, 8588 mSDsCounter, 0 mSdLazyCounter, 5071 mSolverCounterSat, 50 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22386.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3009 SdHoareTripleChecker+Valid, 12317 SdHoareTripleChecker+Invalid, 5123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.78ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 5071 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29212.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:41,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3009 Valid, 12317 Invalid, 5123 Unknown, 0 Unchecked, 41.78ms Time], IncrementalHoareTripleChecker [50 Valid, 5071 Invalid, 2 Unknown, 0 Unchecked, 29212.07ms Time] [2021-11-12 22:35:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9213 states. [2021-11-12 22:35:42,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9213 to 9213. [2021-11-12 22:35:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9213 states, 5575 states have (on average 1.2242152466367713) internal successors, (6825), 5597 states have internal predecessors, (6825), 3467 states have call successors, (3467), 164 states have call predecessors, (3467), 170 states have return successors, (3532), 3456 states have call predecessors, (3532), 3465 states have call successors, (3532) [2021-11-12 22:35:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9213 states to 9213 states and 13824 transitions. [2021-11-12 22:35:42,522 INFO L78 Accepts]: Start accepts. Automaton has 9213 states and 13824 transitions. Word has length 989 [2021-11-12 22:35:42,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:42,523 INFO L470 AbstractCegarLoop]: Abstraction has 9213 states and 13824 transitions. [2021-11-12 22:35:42,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 43.625) internal successors, (349), 8 states have internal predecessors, (349), 4 states have call successors, (242), 3 states have call predecessors, (242), 4 states have return successors, (241), 4 states have call predecessors, (241), 4 states have call successors, (241) [2021-11-12 22:35:42,523 INFO L276 IsEmpty]: Start isEmpty. Operand 9213 states and 13824 transitions. [2021-11-12 22:35:42,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2021-11-12 22:35:42,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:42,539 INFO L514 BasicCegarLoop]: trace histogram [210, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:42,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:42,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-12 22:35:42,740 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:42,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1598337473, now seen corresponding path program 1 times [2021-11-12 22:35:42,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:42,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413382550] [2021-11-12 22:35:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:42,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:43,043 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:35:43,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030040278] [2021-11-12 22:35:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:43,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:43,053 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:43,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcd8317-0a80-47de-8b05-0b6b592a90b8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 22:35:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 3279 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-12 22:35:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:03,583 INFO L354 Elim1Store]: treesize reduction 34, result has 63.4 percent of original size [2021-11-12 22:36:03,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 86 [2021-11-12 22:36:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 43922 backedges. 25256 proven. 1338 refuted. 0 times theorem prover too weak. 17328 trivial. 0 not checked. [2021-11-12 22:36:07,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 43922 backedges. 320 proven. 304 refuted. 0 times theorem prover too weak. 43298 trivial. 0 not checked. [2021-11-12 22:36:14,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:36:14,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413382550] [2021-11-12 22:36:14,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:36:14,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030040278] [2021-11-12 22:36:14,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030040278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:14,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [26948302] [2021-11-12 22:36:14,206 INFO L159 IcfgInterpreter]: Started Sifa with 552 locations of interest [2021-11-12 22:36:14,206 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:36:14,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:36:14,220 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:36:14,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:36:50,969 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:36:50,996 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:36:50,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:36:51,009 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:36:51,011 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:36:51,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size -37 [2021-11-12 22:36:51,020 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size -36 [2021-11-12 22:36:51,021 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:36:51,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:36:51,025 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-12 22:36:51,027 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:36:51,027 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:36:51,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 543 [2021-11-12 22:36:51,029 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:36:51,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:36:51,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-12 22:36:51,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 991 [2021-11-12 22:36:52,308 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_127|], 528=[|v_#valid_174|]} [2021-11-12 22:36:58,451 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |#t~string5.base|) [2021-11-12 22:36:58,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:00,490 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |#t~string6.base|) [2021-11-12 22:37:00,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:02,517 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#__startrek_start~0.base|) [2021-11-12 22:37:02,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:04,574 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#__startrek_end~0.base|) [2021-11-12 22:37:04,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:06,632 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#__startrek_max~0.base|) [2021-11-12 22:37:06,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:08,700 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |#t~string4.base|) [2021-11-12 22:37:08,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:10,768 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:37:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,809 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |#t~string4.base|) [2021-11-12 22:37:12,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:14,879 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:37:14,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:16,946 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |#t~string4.base|) [2021-11-12 22:37:16,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:19,039 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:37:19,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:21,107 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:37:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:23,211 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:37:23,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:25,316 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#_i_cmd_turn_~0.base|) [2021-11-12 22:37:25,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:27,402 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#bt_receive_buf~0.base|) [2021-11-12 22:37:27,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:29,487 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |#t~string6.base|) [2021-11-12 22:37:29,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:31,556 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#__startrek_start~0.base|) [2021-11-12 22:37:31,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:33,612 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#__startrek_end~0.base|) [2021-11-12 22:37:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:35,656 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#__startrek_max~0.base|) [2021-11-12 22:37:35,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:37,701 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |#t~string5.base|) [2021-11-12 22:37:37,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:39,772 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:37:39,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:41,842 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |#t~string5.base|) [2021-11-12 22:37:41,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:43,951 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:37:43,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:46,045 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |#t~string5.base|) [2021-11-12 22:37:46,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:48,134 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:37:48,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:50,246 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:37:50,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:52,382 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:37:52,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:54,529 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#_i_cmd_turn_~0.base|) [2021-11-12 22:37:54,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:56,623 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#bt_receive_buf~0.base|) [2021-11-12 22:37:56,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:58,686 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#__startrek_start~0.base|) [2021-11-12 22:37:58,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:00,748 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#__startrek_end~0.base|) [2021-11-12 22:38:00,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:02,797 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#__startrek_max~0.base|) [2021-11-12 22:38:02,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:04,850 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |#t~string6.base|) [2021-11-12 22:38:04,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:06,888 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:38:06,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:08,942 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |#t~string6.base|) [2021-11-12 22:38:08,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:11,022 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:38:11,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:13,083 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |#t~string6.base|) [2021-11-12 22:38:13,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:15,197 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:38:15,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:17,302 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:38:17,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:19,412 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:38:19,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:21,505 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#_i_cmd_turn_~0.base|) [2021-11-12 22:38:21,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:23,612 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#bt_receive_buf~0.base|) [2021-11-12 22:38:23,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:25,677 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_end~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:38:25,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:27,703 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_max~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:38:27,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:29,740 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:38:29,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:31,822 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_start~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:38:31,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:33,910 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:38:33,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:36,007 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_obstacle_flag_~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:38:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:38,099 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:38:38,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:40,198 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:38:40,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:42,310 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_cmd_forward_~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:38:42,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:44,420 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_turn_~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:38:44,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:46,531 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_cmd_turn_~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:38:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:48,613 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#bt_receive_buf~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:38:48,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:50,679 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_end~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:38:50,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:52,724 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#__startrek_end~0.base|) [2021-11-12 22:38:52,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:54,779 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_end~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:38:54,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:56,878 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#__startrek_end~0.base|) [2021-11-12 22:38:56,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:58,947 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_end~0.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:38:58,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:01,005 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#__startrek_end~0.base|) [2021-11-12 22:39:01,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:03,096 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#__startrek_end~0.base|) [2021-11-12 22:39:03,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:05,211 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_end~0.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:39:05,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:07,338 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_end~0.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:39:07,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:09,475 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_end~0.base| |~#_i_cmd_turn_~0.base|) [2021-11-12 22:39:09,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:11,605 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_end~0.base| |~#bt_receive_buf~0.base|) [2021-11-12 22:39:11,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:13,705 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:39:13,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:15,763 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_max~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:39:15,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:17,797 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:39:17,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:19,861 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_obstacle_flag_~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:39:19,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:21,926 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:39:21,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:24,012 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:39:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:26,115 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_max~0.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:39:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:28,219 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_max~0.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:39:28,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:30,309 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_cmd_turn_~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:39:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:32,459 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#bt_receive_buf~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:39:32,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:34,527 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:39:34,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:36,599 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#_i_nxtway_gs_mode_~0.base|) [2021-11-12 22:39:36,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:38,649 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:39:38,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:40,751 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#_i_obstacle_flag_~0.base|) [2021-11-12 22:39:40,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:42,827 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:39:42,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:44,951 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:39:45,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:47,061 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:39:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:49,133 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#_i_cmd_turn_~0.base|) [2021-11-12 22:39:49,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:51,239 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#bt_receive_buf~0.base|) [2021-11-12 22:39:51,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:53,360 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:39:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:55,413 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_obstacle_flag_~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:39:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:57,502 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:39:57,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:39:59,550 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:39:59,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:01,634 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_cmd_forward_~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:40:01,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:03,720 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_turn_~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:40:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:05,820 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_cmd_turn_~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:40:05,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:07,928 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#bt_receive_buf~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:40:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:10,008 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:40:10,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:12,086 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#_i_nxtway_gs_mode_~0.base|) [2021-11-12 22:40:12,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:14,141 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:40:14,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:16,206 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:40:16,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:18,300 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:40:18,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:20,377 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#_i_cmd_turn_~0.base|) [2021-11-12 22:40:20,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:22,474 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#bt_receive_buf~0.base|) [2021-11-12 22:40:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:24,561 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:40:24,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:26,622 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:40:26,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:28,670 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_obstacle_flag_~0.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:40:28,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:30,740 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_obstacle_flag_~0.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:40:30,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:32,813 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_cmd_turn_~0.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:40:32,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:34,929 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#bt_receive_buf~0.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:40:34,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:36,984 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:40:36,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:39,032 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:40:39,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:41,097 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:40:41,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:43,205 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#_i_cmd_turn_~0.base|) [2021-11-12 22:40:43,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:45,262 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#bt_receive_buf~0.base|) [2021-11-12 22:40:45,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:47,348 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:40:47,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:49,452 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:40:49,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:51,528 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#_i_cmd_turn_~0.base|) [2021-11-12 22:40:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:53,615 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#bt_receive_buf~0.base|) [2021-11-12 22:40:53,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:55,723 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_turn_~0.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:40:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:57,793 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_cmd_turn_~0.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:40:57,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:59,882 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#bt_receive_buf~0.base| |~#_i_cmd_forward_~0.base|) [2021-11-12 22:40:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:01,936 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_cmd_turn_~0.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:41:01,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:03,983 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#bt_receive_buf~0.base| |~#_cmd_turn_~0.base|) [2021-11-12 22:41:03,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:06,063 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_cmd_turn_~0.base| |~#bt_receive_buf~0.base|) [2021-11-12 22:41:06,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:06,065 INFO L244 Elim1Store]: Index analysis took 249634 ms [2021-11-12 22:41:06,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 142 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 81 [2021-11-12 22:41:06,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:41:06,082 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-12 22:41:06,083 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:41:06,084 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-12 22:41:06,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:41:06,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:41:06,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:41:10,256 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| 0) [2021-11-12 22:41:10,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:12,313 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |#t~string6.base|) [2021-11-12 22:41:12,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:14,329 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |#t~string6.base|) [2021-11-12 22:41:14,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:16,380 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_max~0.base| 0) [2021-11-12 22:41:16,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:18,423 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#__startrek_max~0.base|) [2021-11-12 22:41:18,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:20,480 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#__startrek_max~0.base|) [2021-11-12 22:41:20,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:22,512 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#__startrek_max~0.base|) [2021-11-12 22:41:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:24,579 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_max~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:41:26,597 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= |~#__startrek_max~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:41:28,631 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_end~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:41:30,675 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= |~#__startrek_end~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:41:32,708 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| 0) [2021-11-12 22:41:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:34,753 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string4.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:41:34,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:36,788 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string5.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:41:36,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:38,856 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |#t~string6.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:41:38,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:41:40,896 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:41:42,935 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= |~#_cmd_forward_~0.base| |~#__startrek_start~0.base|) [2021-11-12 22:41:44,992 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#__startrek_end~0.base|) [2021-11-12 22:41:47,008 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= |~#_cmd_forward_~0.base| |~#__startrek_end~0.base|) [2021-11-12 22:41:49,033 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:41:51,056 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= |~#_cmd_forward_~0.base| |~#__startrek_max~0.base|) [2021-11-12 22:41:53,116 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#__startrek_min~0.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:41:55,131 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= |~#__startrek_min~0.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:41:57,185 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:41:59,235 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= |~#_cmd_forward_~0.base| |~#_nxtway_gs_mode_~0.base|) [2021-11-12 22:42:01,288 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:42:03,310 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= |~#_i_nxtway_gs_mode_~0.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:42:05,386 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_cmd_forward_~0.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:42:07,457 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= |~#_cmd_forward_~0.base| |~#_obstacle_flag_~0.base|) [2021-11-12 22:42:09,482 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= |~#_i_obstacle_flag_~0.base| |~#_cmd_forward_~0.base|) [2021-11-12 22:42:11,529 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= |~#_i_obstacle_flag_~0.base| |~#_cmd_forward_~0.base|)