./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8 --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 173419c809fa8cb7fa094fdfc7b5765802a9a2fdebfe9d0a53cd745fd0c573d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:27:36,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:27:36,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:27:36,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:27:36,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:27:36,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:27:36,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:27:36,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:27:36,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:27:36,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:27:36,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:27:36,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:27:36,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:27:36,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:27:36,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:27:36,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:27:36,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:27:36,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:27:36,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:27:36,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:27:36,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:27:36,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:27:36,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:27:36,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:27:36,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:27:36,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:27:36,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:27:36,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:27:36,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:27:36,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:27:36,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:27:36,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:27:36,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:27:36,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:27:36,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:27:36,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:27:36,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:27:36,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:27:36,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:27:36,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:27:36,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:27:36,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:27:36,317 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:27:36,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:27:36,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:27:36,319 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:27:36,319 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:27:36,319 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:27:36,319 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:27:36,320 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:27:36,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:27:36,320 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:27:36,327 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:27:36,327 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:27:36,328 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:27:36,328 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:27:36,328 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:27:36,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:27:36,329 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:27:36,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:27:36,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:27:36,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:27:36,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:27:36,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:27:36,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:27:36,331 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:27:36,331 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:27:36,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:27:36,332 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:27:36,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:27:36,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:27:36,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:27:36,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:27:36,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:27:36,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:27:36,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:27:36,334 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:27:36,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:27:36,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:27:36,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:27:36,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:27:36,335 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_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 173419c809fa8cb7fa094fdfc7b5765802a9a2fdebfe9d0a53cd745fd0c573d2 [2021-11-07 01:27:36,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:27:36,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:27:36,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:27:36,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:27:36,636 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:27:36,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2021-11-07 01:27:36,716 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/data/6c0da80b3/274c48f6f1754307a4b09d35b5918ec2/FLAGb9bfffd1e [2021-11-07 01:27:37,155 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:27:37,156 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2021-11-07 01:27:37,162 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/data/6c0da80b3/274c48f6f1754307a4b09d35b5918ec2/FLAGb9bfffd1e [2021-11-07 01:27:37,541 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/data/6c0da80b3/274c48f6f1754307a4b09d35b5918ec2 [2021-11-07 01:27:37,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:27:37,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:27:37,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:27:37,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:27:37,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:27:37,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@edd0c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37, skipping insertion in model container [2021-11-07 01:27:37,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:27:37,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:27:37,747 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_17a2cb16-3588-47ec-9fa0-753af020c698/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c[588,601] [2021-11-07 01:27:37,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:37,774 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:27:37,783 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_17a2cb16-3588-47ec-9fa0-753af020c698/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c[588,601] [2021-11-07 01:27:37,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:37,806 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:27:37,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37 WrapperNode [2021-11-07 01:27:37,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:27:37,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:27:37,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:27:37,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:27:37,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:27:37,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:27:37,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:27:37,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:27:37,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:27:37,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:27:37,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:27:37,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:27:37,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37" (1/1) ... [2021-11-07 01:27:37,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:27:37,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:37,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:27:37,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:27:37,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:27:37,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:27:37,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:27:37,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:27:38,320 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:27:38,320 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-11-07 01:27:38,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:38 BoogieIcfgContainer [2021-11-07 01:27:38,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:27:38,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:27:38,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:27:38,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:27:38,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:27:37" (1/3) ... [2021-11-07 01:27:38,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ef0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:38, skipping insertion in model container [2021-11-07 01:27:38,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:37" (2/3) ... [2021-11-07 01:27:38,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ef0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:38, skipping insertion in model container [2021-11-07 01:27:38,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:38" (3/3) ... [2021-11-07 01:27:38,332 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound5.c [2021-11-07 01:27:38,337 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:27:38,337 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-07 01:27:38,404 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:27:38,411 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 [2021-11-07 01:27:38,411 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-07 01:27:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 48 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:27:38,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:38,438 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:27:38,439 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:27:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:38,445 INFO L85 PathProgramCache]: Analyzing trace with hash 162760247, now seen corresponding path program 1 times [2021-11-07 01:27:38,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:38,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231599761] [2021-11-07 01:27:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:38,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:38,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:38,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231599761] [2021-11-07 01:27:38,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231599761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:38,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:38,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:27:38,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415532522] [2021-11-07 01:27:38,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:38,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:27:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:38,702 INFO L87 Difference]: Start difference. First operand has 49 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 48 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:38,855 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2021-11-07 01:27:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:38,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 01:27:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:38,867 INFO L225 Difference]: With dead ends: 96 [2021-11-07 01:27:38,867 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 01:27:38,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:27:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 01:27:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-11-07 01:27:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-11-07 01:27:38,922 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 5 [2021-11-07 01:27:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:38,922 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-11-07 01:27:38,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-11-07 01:27:38,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:27:38,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:38,924 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:38,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:27:38,925 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:27:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1793930266, now seen corresponding path program 1 times [2021-11-07 01:27:38,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:38,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641562458] [2021-11-07 01:27:38,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:38,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:38,960 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:27:38,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903862487] [2021-11-07 01:27:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:38,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:38,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:38,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:27:38,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:27:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:39,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:27:39,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:39,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:39,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:39,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641562458] [2021-11-07 01:27:39,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:27:39,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903862487] [2021-11-07 01:27:39,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903862487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:39,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:39,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:27:39,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602539057] [2021-11-07 01:27:39,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:27:39,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:27:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:27:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:27:39,250 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:39,405 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2021-11-07 01:27:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:39,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-07 01:27:39,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:39,411 INFO L225 Difference]: With dead ends: 85 [2021-11-07 01:27:39,411 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 01:27:39,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 01:27:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 48. [2021-11-07 01:27:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-11-07 01:27:39,431 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 7 [2021-11-07 01:27:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:39,432 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-11-07 01:27:39,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-11-07 01:27:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:27:39,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:39,433 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:39,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:39,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:39,656 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:27:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash -227354147, now seen corresponding path program 1 times [2021-11-07 01:27:39,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:39,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549741198] [2021-11-07 01:27:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:39,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:39,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:39,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549741198] [2021-11-07 01:27:39,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549741198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:39,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:39,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:27:39,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688182396] [2021-11-07 01:27:39,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:39,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:27:39,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:39,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:39,699 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:39,724 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-07 01:27:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 01:27:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:39,726 INFO L225 Difference]: With dead ends: 70 [2021-11-07 01:27:39,727 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 01:27:39,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 01:27:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-07 01:27:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-07 01:27:39,747 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 8 [2021-11-07 01:27:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:39,747 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-07 01:27:39,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-07 01:27:39,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:27:39,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:39,749 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:39,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:27:39,750 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:27:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1685255837, now seen corresponding path program 1 times [2021-11-07 01:27:39,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:39,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758881870] [2021-11-07 01:27:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:39,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:39,776 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:27:39,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570821826] [2021-11-07 01:27:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:39,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:39,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:39,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:27:39,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:27:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:39,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:27:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:39,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:39,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:39,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758881870] [2021-11-07 01:27:39,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:27:39,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570821826] [2021-11-07 01:27:39,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570821826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:39,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:39,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:27:39,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017097436] [2021-11-07 01:27:39,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:27:39,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:27:39,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:27:39,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:27:39,957 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:40,043 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-11-07 01:27:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:40,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 01:27:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:40,045 INFO L225 Difference]: With dead ends: 83 [2021-11-07 01:27:40,045 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 01:27:40,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 01:27:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-11-07 01:27:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.26) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-11-07 01:27:40,055 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 9 [2021-11-07 01:27:40,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:40,055 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-11-07 01:27:40,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-11-07 01:27:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:27:40,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:40,056 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:40,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:40,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:40,269 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:27:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:40,270 INFO L85 PathProgramCache]: Analyzing trace with hash 328345024, now seen corresponding path program 1 times [2021-11-07 01:27:40,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:40,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712706436] [2021-11-07 01:27:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:40,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:40,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:27:40,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019429524] [2021-11-07 01:27:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:40,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:40,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:40,286 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:27:40,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:27:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:40,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:27:40,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:40,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:40,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:40,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712706436] [2021-11-07 01:27:40,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:27:40,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019429524] [2021-11-07 01:27:40,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019429524] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:40,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:40,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:27:40,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507128176] [2021-11-07 01:27:40,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:27:40,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:27:40,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:27:40,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:27:40,589 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:40,883 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-11-07 01:27:40,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:27:40,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 01:27:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:40,884 INFO L225 Difference]: With dead ends: 118 [2021-11-07 01:27:40,884 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 01:27:40,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:27:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 01:27:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-11-07 01:27:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-11-07 01:27:40,897 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 11 [2021-11-07 01:27:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:40,898 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-11-07 01:27:40,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-11-07 01:27:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:27:40,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:40,899 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:40,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:41,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:41,121 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:27:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:41,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1757696914, now seen corresponding path program 1 times [2021-11-07 01:27:41,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:41,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315732394] [2021-11-07 01:27:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:41,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:41,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:27:41,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151205687] [2021-11-07 01:27:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:41,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:41,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:41,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:27:41,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:27:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:41,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:27:41,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:41,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:41,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:41,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315732394] [2021-11-07 01:27:41,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:27:41,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151205687] [2021-11-07 01:27:41,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151205687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:41,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745406878] [2021-11-07 01:27:41,565 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-07 01:27:41,566 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:27:41,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:27:41,575 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:27:41,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:27:41,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,616 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:27:41,617 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:27:41,618 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:27:41,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:27:41,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:27:41,673 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-07 01:27:41,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:27:41,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,719 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:41,720 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,720 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:41,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:41,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:27:41,743 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,744 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:41,745 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,746 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:41,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:41,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:41,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:27:41,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,857 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:41,858 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:41,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:41,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:41,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:27:41,890 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:41,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:41,895 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:41,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:41,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,938 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:27:41,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:27:41,960 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:27:41,975 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:41,993 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:27:42,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,016 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:27:42,027 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,052 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:27:42,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:27:42,077 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:27:42,093 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,102 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:27:42,111 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 512 [2021-11-07 01:27:42,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:42,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:42,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:42,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:42,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:42,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:42,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:42,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:42,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:42,223 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:27:42,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:27:42,227 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:27:42,233 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:27:42,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,246 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:27:42,250 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:27:42,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,265 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:27:42,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,278 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:27:42,284 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:27:42,286 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:27:42,289 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,292 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:27:42,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:27:42,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:27:42,322 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:27:42,334 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:42,340 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:27:42,357 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:27:43,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:27:43,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:43,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-07 01:27:43,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022508446] [2021-11-07 01:27:43,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:27:43,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:27:43,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:27:43,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:27:43,523 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:45,945 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-11-07 01:27:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:27:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 01:27:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:45,947 INFO L225 Difference]: With dead ends: 85 [2021-11-07 01:27:45,947 INFO L226 Difference]: Without dead ends: 77 [2021-11-07 01:27:45,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:27:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-07 01:27:45,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2021-11-07 01:27:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-11-07 01:27:45,973 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 19 [2021-11-07 01:27:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:45,973 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-11-07 01:27:45,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:45,973 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-11-07 01:27:45,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:27:45,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:45,974 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:46,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:46,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 01:27:46,175 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:27:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1350588059, now seen corresponding path program 1 times [2021-11-07 01:27:46,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:46,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242762462] [2021-11-07 01:27:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:46,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:46,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:27:46,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462050630] [2021-11-07 01:27:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:46,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:46,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:46,189 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:27:46,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:27:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:46,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:46,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:46,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:46,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:46,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242762462] [2021-11-07 01:27:46,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:27:46,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462050630] [2021-11-07 01:27:46,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462050630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:46,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803115229] [2021-11-07 01:27:46,425 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-07 01:27:46,425 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:27:46,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:27:46,426 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:27:46,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:27:46,444 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,445 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:27:46,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,446 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:27:46,458 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:27:46,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,459 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:27:46,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:27:46,476 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-07 01:27:46,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:27:46,494 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:46,495 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:46,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:46,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:27:46,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,537 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:46,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:46,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:46,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:46,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:27:46,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,587 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:46,587 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:46,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:46,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:46,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:27:46,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:46,617 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:46,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:46,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:46,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,636 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:27:46,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:27:46,641 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:27:46,645 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:27:46,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:27:46,668 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,679 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:27:46,685 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,692 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:27:46,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:27:46,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:27:46,731 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 418 [2021-11-07 01:27:46,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:46,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:46,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:46,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:46,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:46,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:46,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:46,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:46,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:46,804 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:27:46,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:27:46,807 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,809 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:27:46,812 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,816 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:27:46,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:27:46,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:27:46,834 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,838 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:27:46,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,851 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 381 [2021-11-07 01:27:46,859 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:27:46,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:27:46,863 INFO L180 QuantifierPusher]: treesize reduction 4, result has 93.4 percent of original size [2021-11-07 01:27:46,865 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-07 01:27:46,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:46,873 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-07 01:27:47,008 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:47,012 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:27:47,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:47,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:27:47,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:47,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:27:47,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:47,045 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:27:47,051 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:47,056 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:27:47,061 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:27:53,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:27:53,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:53,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-07 01:27:53,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039728165] [2021-11-07 01:27:53,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:27:53,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:27:53,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:27:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:27:53,011 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:53,076 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2021-11-07 01:27:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:27:53,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 01:27:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:53,077 INFO L225 Difference]: With dead ends: 143 [2021-11-07 01:27:53,078 INFO L226 Difference]: Without dead ends: 115 [2021-11-07 01:27:53,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:27:53,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-07 01:27:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2021-11-07 01:27:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 82 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-11-07 01:27:53,121 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 20 [2021-11-07 01:27:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:53,122 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-11-07 01:27:53,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-11-07 01:27:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:27:53,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:53,123 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:53,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:53,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 01:27:53,348 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:27:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:53,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1224742933, now seen corresponding path program 1 times [2021-11-07 01:27:53,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:53,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889436031] [2021-11-07 01:27:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:53,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:53,359 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:27:53,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127326289] [2021-11-07 01:27:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:53,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:53,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:53,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:27:53,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:27:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:53,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:27:53,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:53,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:53,794 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:53,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889436031] [2021-11-07 01:27:53,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:27:53,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127326289] [2021-11-07 01:27:53,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127326289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:53,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79585466] [2021-11-07 01:27:53,799 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-07 01:27:53,799 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:27:53,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:27:53,800 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:27:53,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:27:53,810 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,811 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:27:53,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:27:53,812 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:27:53,813 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:27:53,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:27:53,838 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-07 01:27:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:27:53,864 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:53,867 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:53,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:53,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:27:53,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:53,888 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:53,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:53,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:53,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:27:53,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:53,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,951 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:53,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:53,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:53,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:27:53,980 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,982 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:53,983 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,983 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:53,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:53,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:53,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:53,998 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:27:54,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:27:54,002 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:27:54,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:27:54,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:27:54,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:27:54,035 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:27:54,046 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,052 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:27:54,057 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:27:54,069 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 427 [2021-11-07 01:27:54,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:54,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:54,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:54,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:54,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:54,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:54,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:54,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:54,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:54,130 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:27:54,132 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:27:54,134 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:27:54,138 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,141 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:27:54,144 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,148 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:27:54,151 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:27:54,157 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:27:54,192 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 340 [2021-11-07 01:27:54,204 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:27:54,206 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:27:54,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,210 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:27:54,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:27:54,222 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:27:54,233 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:27:54,250 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:54,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:27:54,259 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:27:55,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:27:55,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:55,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-07 01:27:55,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578503878] [2021-11-07 01:27:55,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:27:55,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:27:55,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:27:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:27:55,348 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:55,463 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2021-11-07 01:27:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:27:55,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-07 01:27:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:55,465 INFO L225 Difference]: With dead ends: 91 [2021-11-07 01:27:55,465 INFO L226 Difference]: Without dead ends: 89 [2021-11-07 01:27:55,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:27:55,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-07 01:27:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2021-11-07 01:27:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-11-07 01:27:55,476 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 21 [2021-11-07 01:27:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:55,477 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-11-07 01:27:55,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-11-07 01:27:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:27:55,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:55,478 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:55,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-07 01:27:55,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:55,692 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:27:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:55,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2066530638, now seen corresponding path program 1 times [2021-11-07 01:27:55,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:55,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125409987] [2021-11-07 01:27:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:55,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:55,711 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:27:55,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185921975] [2021-11-07 01:27:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:55,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:55,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:55,720 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:27:55,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 01:27:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:55,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:27:55,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:56,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:56,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:56,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125409987] [2021-11-07 01:27:56,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:27:56,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185921975] [2021-11-07 01:27:56,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185921975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:56,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218322698] [2021-11-07 01:27:56,875 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-07 01:27:56,875 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:27:56,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:27:56,876 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:27:56,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:27:56,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:56,885 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:27:56,886 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:56,887 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:27:56,887 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:27:56,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:56,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:27:56,896 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:27:56,900 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-07 01:27:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:27:56,922 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:56,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:56,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:56,924 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:56,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:56,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:27:56,940 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:56,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:56,940 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:56,941 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:27:56,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:56,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:56,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:56,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:27:56,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:56,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:56,981 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:56,982 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:56,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:56,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:57,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:27:57,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,006 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:57,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:27:57,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:27:57,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:57,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,033 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,036 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:27:57,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:27:57,037 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:27:57,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:27:57,050 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:27:57,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:27:57,078 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,084 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:27:57,090 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,095 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:27:57,100 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:27:57,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 517 [2021-11-07 01:27:57,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:57,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:57,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:57,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:57,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:57,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:57,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:57,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:57,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:27:57,174 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:27:57,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:27:57,177 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,179 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:27:57,181 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,184 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:27:57,186 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:27:57,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:27:57,202 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,206 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:27:57,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-07 01:27:57,220 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:27:57,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:27:57,224 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:27:57,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:27:57,242 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,246 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:27:57,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:27:57,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:27:57,274 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,278 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-07 01:27:57,284 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:27:57,288 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-11-07 01:27:57,294 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:28:00,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:28:00,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:28:00,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 01:28:00,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528720454] [2021-11-07 01:28:00,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:28:00,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:28:00,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:28:00,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:28:00,101 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:01,250 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-11-07 01:28:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:28:01,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 01:28:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:01,252 INFO L225 Difference]: With dead ends: 111 [2021-11-07 01:28:01,252 INFO L226 Difference]: Without dead ends: 109 [2021-11-07 01:28:01,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:28:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-07 01:28:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-11-07 01:28:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2021-11-07 01:28:01,265 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 30 [2021-11-07 01:28:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:01,265 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2021-11-07 01:28:01,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2021-11-07 01:28:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:28:01,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:01,267 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:01,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:01,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:28:01,492 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:28:01,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:01,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1660894443, now seen corresponding path program 1 times [2021-11-07 01:28:01,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:28:01,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646392468] [2021-11-07 01:28:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:01,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:28:01,503 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:28:01,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541132414] [2021-11-07 01:28:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:01,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:28:01,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:28:01,504 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:28:01,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:28:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:28:01,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:02,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:02,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:28:02,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646392468] [2021-11-07 01:28:02,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:28:02,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541132414] [2021-11-07 01:28:02,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541132414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:02,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762662074] [2021-11-07 01:28:02,610 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-07 01:28:02,611 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:28:02,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:28:02,611 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:28:02,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:28:02,618 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,619 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:28:02,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,624 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:28:02,625 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:28:02,625 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:28:02,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:28:02,638 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-07 01:28:02,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:28:02,655 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:28:02,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:28:02,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:28:02,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:28:02,672 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,673 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:28:02,673 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,673 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:28:02,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:28:02,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:02,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:28:02,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:28:02,715 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:28:02,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:28:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:02,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:28:02,754 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,755 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:28:02,756 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,756 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:28:02,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:28:02,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:02,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,767 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:28:02,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:28:02,770 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:28:02,773 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:28:02,782 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,788 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:28:02,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:28:02,803 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:28:02,812 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,817 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:28:02,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:28:02,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 477 [2021-11-07 01:28:02,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:02,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:02,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:02,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:02,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:02,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:02,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:02,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:02,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:02,892 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:28:02,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:28:02,895 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,896 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:28:02,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:28:02,905 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:28:02,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:28:02,918 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:28:02,925 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-07 01:28:02,936 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:28:02,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:28:02,940 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,942 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:28:02,947 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:28:02,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,959 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:28:02,964 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,968 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:28:02,974 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:28:02,987 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:02,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-07 01:28:03,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:03,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-11-07 01:28:03,018 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:03,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 170 [2021-11-07 01:28:03,031 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:28:05,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [762662074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:05,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:28:05,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 5] total 19 [2021-11-07 01:28:05,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427450163] [2021-11-07 01:28:05,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:28:05,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:28:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:28:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:28:05,229 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:07,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:07,842 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-11-07 01:28:07,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:28:07,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 01:28:07,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:07,843 INFO L225 Difference]: With dead ends: 107 [2021-11-07 01:28:07,843 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 01:28:07,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 13 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:28:07,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 01:28:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-11-07 01:28:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-11-07 01:28:07,858 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 32 [2021-11-07 01:28:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:07,859 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-11-07 01:28:07,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-11-07 01:28:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:28:07,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:07,860 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-07 01:28:07,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:08,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:28:08,088 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:28:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1934542221, now seen corresponding path program 2 times [2021-11-07 01:28:08,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:28:08,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796026441] [2021-11-07 01:28:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:08,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:28:08,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:28:08,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799272516] [2021-11-07 01:28:08,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:28:08,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:28:08,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:28:08,100 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:28:08,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 01:28:08,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:28:08,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:28:08,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 01:28:08,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:25,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:28:25,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796026441] [2021-11-07 01:28:25,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:28:25,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799272516] [2021-11-07 01:28:25,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~n~0] [2021-11-07 01:28:25,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1717379625] [2021-11-07 01:28:25,942 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-07 01:28:25,942 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:28:25,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:28:25,942 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:28:25,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:28:25,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:25,948 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:28:25,949 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:25,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:28:25,950 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:28:25,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:25,951 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:28:25,958 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:28:25,962 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-07 01:28:25,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:25,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:25,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:28:25,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:25,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:28:25,986 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:25,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:28:25,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:28:25,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:25,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:28:26,011 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:28:26,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,012 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:28:26,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:28:26,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:26,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:28:26,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:28:26,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,066 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:28:26,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:28:26,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:26,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:28:26,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:28:26,100 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:28:26,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:28:26,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:26,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,113 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:28:26,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:28:26,117 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:28:26,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:28:26,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,160 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:28:26,165 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:28:26,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:28:26,186 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:28:26,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,203 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:28:26,209 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 583 [2021-11-07 01:28:26,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:26,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:26,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:26,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:26,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:26,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:26,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:26,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:26,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:28:26,265 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:28:26,267 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:28:26,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:28:26,273 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,276 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:28:26,278 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,282 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:28:26,285 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,288 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:28:26,291 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:28:26,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-11-07 01:28:26,309 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:28:26,311 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:28:26,314 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,315 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:28:26,321 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:28:26,329 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:28:26,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:28:26,353 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:28:26,356 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:28:26,362 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:28:50,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:28:50,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:50,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 01:28:50,626 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-07 01:28:50,626 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 01:28:50,631 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:28:50,633 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:28:50,633 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:28:50,634 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:28:50,634 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:28:50,634 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:28:50,634 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:28:50,634 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:28:50,635 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:28:50,635 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:28:50,635 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:28:50,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:50,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-07 01:28:50,838 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:50,840 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:28:50,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:28:50 BoogieIcfgContainer [2021-11-07 01:28:50,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:28:50,853 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:28:50,853 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:28:50,853 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:28:50,853 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:38" (3/4) ... [2021-11-07 01:28:50,856 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:28:50,856 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:28:50,857 INFO L168 Benchmark]: Toolchain (without parser) took 73311.21 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 104.7 MB in the beginning and 125.7 MB in the end (delta: -21.0 MB). Peak memory consumption was 40.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:28:50,857 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory was 46.8 MB in the beginning and 46.8 MB in the end (delta: 40.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:28:50,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.36 ms. Allocated memory is still 138.4 MB. Free memory was 104.4 MB in the beginning and 113.8 MB in the end (delta: -9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:28:50,857 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.00 ms. Allocated memory is still 138.4 MB. Free memory was 113.8 MB in the beginning and 112.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:28:50,858 INFO L168 Benchmark]: Boogie Preprocessor took 26.70 ms. Allocated memory is still 138.4 MB. Free memory was 112.1 MB in the beginning and 110.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:28:50,858 INFO L168 Benchmark]: RCFGBuilder took 448.85 ms. Allocated memory is still 138.4 MB. Free memory was 110.5 MB in the beginning and 98.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:28:50,858 INFO L168 Benchmark]: TraceAbstraction took 72527.98 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 97.6 MB in the beginning and 125.7 MB in the end (delta: -28.2 MB). Peak memory consumption was 36.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:28:50,858 INFO L168 Benchmark]: Witness Printer took 3.11 ms. Allocated memory is still 201.3 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:28:50,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory was 46.8 MB in the beginning and 46.8 MB in the end (delta: 40.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.36 ms. Allocated memory is still 138.4 MB. Free memory was 104.4 MB in the beginning and 113.8 MB in the end (delta: -9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.00 ms. Allocated memory is still 138.4 MB. Free memory was 113.8 MB in the beginning and 112.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.70 ms. Allocated memory is still 138.4 MB. Free memory was 112.1 MB in the beginning and 110.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 448.85 ms. Allocated memory is still 138.4 MB. Free memory was 110.5 MB in the beginning and 98.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 72527.98 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 97.6 MB in the beginning and 125.7 MB in the end (delta: -28.2 MB). Peak memory consumption was 36.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.11 ms. Allocated memory is still 201.3 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] int counter = 0; [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 [L33] EXPR counter++ [L33] COND TRUE counter++<5 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 [L33] EXPR counter++ [L33] COND TRUE counter++<5 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 [L33] EXPR counter++ [L33] COND TRUE counter++<5 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND TRUE !(cond) [L17] reach_error() - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 49 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 72.4s, OverallIterations: 11, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 289 SDtfs, 530 SDslu, 774 SDs, 0 SdLazy, 812 SolverSat, 151 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 6.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 432 GetRequests, 274 SyntacticMatches, 41 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=9, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 143 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 20.7s InterpolantComputationTime, 195 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 293 ConstructedInterpolants, 24 QuantifiedInterpolants, 3257 SizeOfPredicates, 29 NumberOfNonLiveVariables, 856 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 18 InterpolantComputations, 8 PerfectInterpolantSequences, 0/76 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 421, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 20, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 43, TOOLS_POST_TIME[ms]: 332, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 43, TOOLS_QUANTIFIERELIM_TIME[ms]: 323, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 154, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 68, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 39, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 7, DOMAIN_ISBOTTOM_APPLICATIONS: 20, DOMAIN_ISBOTTOM_TIME[ms]: 33, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 163, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 163, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 0, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 3, DAG_COMPRESSION_PROCESSED_NODES: 270, DAG_COMPRESSION_RETAINED_NODES: 59, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 01:28:50,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8 --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 173419c809fa8cb7fa094fdfc7b5765802a9a2fdebfe9d0a53cd745fd0c573d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:28:53,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:28:53,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:28:53,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:28:53,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:28:53,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:28:53,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:28:53,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:28:53,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:28:53,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:28:53,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:28:53,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:28:53,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:28:53,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:28:53,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:28:53,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:28:53,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:28:53,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:28:53,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:28:53,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:28:53,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:28:53,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:28:53,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:28:53,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:28:53,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:28:53,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:28:53,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:28:53,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:28:53,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:28:53,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:28:53,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:28:53,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:28:53,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:28:53,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:28:53,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:28:53,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:28:53,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:28:53,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:28:53,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:28:53,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:28:53,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:28:53,333 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:28:53,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:28:53,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:28:53,380 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:28:53,381 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:28:53,381 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:28:53,381 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:28:53,381 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:28:53,382 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:28:53,382 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:28:53,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:28:53,384 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:28:53,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:28:53,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:28:53,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:28:53,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:28:53,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:28:53,386 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:28:53,386 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:28:53,386 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:28:53,387 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:28:53,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:28:53,387 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:28:53,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:28:53,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:28:53,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:28:53,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:28:53,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:28:53,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:28:53,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:28:53,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:28:53,389 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:28:53,390 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:53,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:28:53,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:28:53,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:28:53,391 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 173419c809fa8cb7fa094fdfc7b5765802a9a2fdebfe9d0a53cd745fd0c573d2 [2021-11-07 01:28:53,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:28:53,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:28:53,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:28:53,796 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:28:53,796 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:28:53,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2021-11-07 01:28:53,864 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/data/98ab38d1f/6387def4e40e4b00930d9aef4a4bc708/FLAGafe0ca9e7 [2021-11-07 01:28:54,337 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:28:54,341 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2021-11-07 01:28:54,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/data/98ab38d1f/6387def4e40e4b00930d9aef4a4bc708/FLAGafe0ca9e7 [2021-11-07 01:28:54,702 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/data/98ab38d1f/6387def4e40e4b00930d9aef4a4bc708 [2021-11-07 01:28:54,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:28:54,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:28:54,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:28:54,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:28:54,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:28:54,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:54,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a72745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54, skipping insertion in model container [2021-11-07 01:28:54,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:54,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:28:54,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:28:54,890 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_17a2cb16-3588-47ec-9fa0-753af020c698/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c[588,601] [2021-11-07 01:28:54,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:28:54,937 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:28:54,950 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_17a2cb16-3588-47ec-9fa0-753af020c698/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c[588,601] [2021-11-07 01:28:54,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:28:54,978 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:28:54,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54 WrapperNode [2021-11-07 01:28:54,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:28:54,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:28:54,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:28:54,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:28:54,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:54,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:55,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:28:55,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:28:55,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:28:55,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:28:55,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:55,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:55,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:55,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:55,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:55,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:55,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:55,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:28:55,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:28:55,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:28:55,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:28:55,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2021-11-07 01:28:55,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:28:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:28:55,081 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:28:55,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:28:55,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:28:55,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:28:55,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:28:55,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:28:56,633 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:28:56,634 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-11-07 01:28:56,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:56 BoogieIcfgContainer [2021-11-07 01:28:56,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:28:56,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:28:56,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:28:56,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:28:56,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:28:54" (1/3) ... [2021-11-07 01:28:56,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1589648f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:56, skipping insertion in model container [2021-11-07 01:28:56,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (2/3) ... [2021-11-07 01:28:56,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1589648f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:56, skipping insertion in model container [2021-11-07 01:28:56,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:56" (3/3) ... [2021-11-07 01:28:56,644 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound5.c [2021-11-07 01:28:56,649 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:28:56,650 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-07 01:28:56,693 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:28:56,700 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 [2021-11-07 01:28:56,701 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-07 01:28:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 40 states have (on average 1.625) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:28:56,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:56,722 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:28:56,722 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:28:56,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:56,728 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-11-07 01:28:56,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:56,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649051899] [2021-11-07 01:28:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:56,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:56,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:56,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:56,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:28:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:56,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:56,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:57,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:57,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:57,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649051899] [2021-11-07 01:28:57,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649051899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:57,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:57,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:28:57,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085371528] [2021-11-07 01:28:57,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:28:57,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:28:57,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:28:57,199 INFO L87 Difference]: Start difference. First operand has 52 states, 40 states have (on average 1.625) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:00,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:00,342 INFO L93 Difference]: Finished difference Result 145 states and 184 transitions. [2021-11-07 01:29:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:29:00,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:29:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:00,352 INFO L225 Difference]: With dead ends: 145 [2021-11-07 01:29:00,352 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 01:29:00,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:29:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 01:29:00,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 44. [2021-11-07 01:29:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-07 01:29:00,391 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 6 [2021-11-07 01:29:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:00,392 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-07 01:29:00,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-07 01:29:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:29:00,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:00,393 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:00,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:29:00,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:00,604 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:29:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:00,605 INFO L85 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-11-07 01:29:00,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:00,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890876219] [2021-11-07 01:29:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:00,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:00,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:00,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:00,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:29:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:00,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:00,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:00,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:01,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:01,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890876219] [2021-11-07 01:29:01,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890876219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:01,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:01,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:29:01,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507404537] [2021-11-07 01:29:01,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:01,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:01,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:01,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:01,721 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:04,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:04,370 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-11-07 01:29:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:29:04,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 01:29:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:04,388 INFO L225 Difference]: With dead ends: 87 [2021-11-07 01:29:04,388 INFO L226 Difference]: Without dead ends: 85 [2021-11-07 01:29:04,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:29:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-07 01:29:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 49. [2021-11-07 01:29:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.275) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-07 01:29:04,400 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 8 [2021-11-07 01:29:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:04,401 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-07 01:29:04,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-07 01:29:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:29:04,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:04,402 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:04,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:29:04,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:04,608 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:29:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:04,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1269812074, now seen corresponding path program 1 times [2021-11-07 01:29:04,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:04,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136731651] [2021-11-07 01:29:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:04,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:04,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:04,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:04,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:29:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:04,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:29:04,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:04,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:04,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:04,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136731651] [2021-11-07 01:29:04,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136731651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:04,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:04,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:29:04,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72160527] [2021-11-07 01:29:04,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:04,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:04,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:04,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:04,879 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:04,970 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-11-07 01:29:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:29:04,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 01:29:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:04,972 INFO L225 Difference]: With dead ends: 108 [2021-11-07 01:29:04,973 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 01:29:04,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:29:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 01:29:04,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2021-11-07 01:29:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 57 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-11-07 01:29:04,991 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 9 [2021-11-07 01:29:04,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:04,991 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-11-07 01:29:04,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:04,993 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-11-07 01:29:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:29:04,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:04,993 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:05,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:05,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:05,207 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:29:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:05,208 INFO L85 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-11-07 01:29:05,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:05,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807838100] [2021-11-07 01:29:05,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:05,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:05,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:05,210 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:05,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:29:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:05,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:05,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:08,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:08,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807838100] [2021-11-07 01:29:08,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807838100] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:08,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:08,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:29:08,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727976513] [2021-11-07 01:29:08,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:08,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:08,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:08,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:08,255 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:11,895 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-11-07 01:29:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:29:11,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 01:29:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:11,918 INFO L225 Difference]: With dead ends: 86 [2021-11-07 01:29:11,919 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 01:29:11,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:29:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 01:29:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2021-11-07 01:29:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-11-07 01:29:11,929 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-11-07 01:29:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:11,930 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-11-07 01:29:11,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:11,930 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-11-07 01:29:11,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:29:11,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:11,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:11,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:12,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:12,141 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:29:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash -828134125, now seen corresponding path program 1 times [2021-11-07 01:29:12,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:12,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426619461] [2021-11-07 01:29:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:12,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:12,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:12,143 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:12,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:29:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:12,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:29:12,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:12,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:14,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:14,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426619461] [2021-11-07 01:29:14,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426619461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:14,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:14,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:29:14,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102601619] [2021-11-07 01:29:14,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:14,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:14,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:14,530 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:23,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:23,899 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2021-11-07 01:29:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:29:23,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 01:29:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:23,901 INFO L225 Difference]: With dead ends: 118 [2021-11-07 01:29:23,901 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 01:29:23,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:29:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 01:29:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2021-11-07 01:29:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-11-07 01:29:23,915 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 12 [2021-11-07 01:29:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:23,916 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-11-07 01:29:23,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-11-07 01:29:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:29:23,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:23,917 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:23,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 01:29:24,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:24,131 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:29:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:24,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1416701979, now seen corresponding path program 1 times [2021-11-07 01:29:24,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:24,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482462159] [2021-11-07 01:29:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:24,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:24,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:24,134 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:24,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:29:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:24,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:29:24,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:24,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:28,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:28,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482462159] [2021-11-07 01:29:28,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482462159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:28,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2129066936] [2021-11-07 01:29:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:28,154 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:28,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:28,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:28,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:29:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:28,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:29:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:29,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:31,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2129066936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:31,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988750769] [2021-11-07 01:29:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:31,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:29:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:29:31,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:29:31,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:29:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:31,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:29:31,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:32,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:53,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988750769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:53,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:29:53,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 8, 8] total 15 [2021-11-07 01:29:53,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586682680] [2021-11-07 01:29:53,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:29:53,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:53,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:29:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=135, Unknown=7, NotChecked=0, Total=210 [2021-11-07 01:29:53,697 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:31,123 WARN L207 SmtUtils]: Spent 10.45 s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-07 01:33:26,660 WARN L207 SmtUtils]: Spent 8.63 s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-07 01:33:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:39,911 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2021-11-07 01:33:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:33:39,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 01:33:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:39,913 INFO L225 Difference]: With dead ends: 161 [2021-11-07 01:33:39,914 INFO L226 Difference]: Without dead ends: 153 [2021-11-07 01:33:39,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 61.3s TimeCoverageRelationStatistics Valid=204, Invalid=380, Unknown=16, NotChecked=0, Total=600 [2021-11-07 01:33:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-07 01:33:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 93. [2021-11-07 01:33:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 92 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-11-07 01:33:39,935 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 20 [2021-11-07 01:33:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:39,936 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-11-07 01:33:39,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-11-07 01:33:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:33:39,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:39,938 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:39,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:40,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 01:33:40,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-07 01:33:40,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:40,553 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:33:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash 54186920, now seen corresponding path program 1 times [2021-11-07 01:33:40,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:40,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012292120] [2021-11-07 01:33:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:40,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:40,555 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:40,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:33:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:40,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:33:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:41,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:51,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:51,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012292120] [2021-11-07 01:33:51,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012292120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:51,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [732195375] [2021-11-07 01:33:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:51,972 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:51,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:33:51,975 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:33:51,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:33:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:52,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:33:52,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:53,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:00,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [732195375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:00,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190108801] [2021-11-07 01:34:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:00,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:34:00,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:00,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:34:00,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 01:34:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:00,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:34:00,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:01,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:10,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190108801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:10,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:34:10,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 10 [2021-11-07 01:34:10,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694119622] [2021-11-07 01:34:10,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:34:10,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:34:10,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:34:10,317 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:38,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:38,135 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2021-11-07 01:34:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:34:38,150 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 01:34:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:38,152 INFO L225 Difference]: With dead ends: 121 [2021-11-07 01:34:38,152 INFO L226 Difference]: Without dead ends: 115 [2021-11-07 01:34:38,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:34:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-07 01:34:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2021-11-07 01:34:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 88 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2021-11-07 01:34:38,170 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 22 [2021-11-07 01:34:38,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:38,170 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2021-11-07 01:34:38,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2021-11-07 01:34:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:34:38,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:38,172 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:38,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:38,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:38,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:38,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:38,776 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:34:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1750673281, now seen corresponding path program 1 times [2021-11-07 01:34:38,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:38,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678572610] [2021-11-07 01:34:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:38,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:38,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:38,778 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:38,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:34:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:39,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:34:39,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:40,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:32,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:32,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678572610] [2021-11-07 01:35:32,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678572610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:32,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [309547556] [2021-11-07 01:35:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:32,731 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:32,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:32,748 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:32,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:35:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:34,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:35:34,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:35,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:26,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [309547556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:26,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33291604] [2021-11-07 01:36:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:26,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:36:26,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:36:26,460 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:36:26,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 01:36:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:27,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:36:27,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:28,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:21,009 WARN L860 $PredicateComparison]: unable to prove that (or (not (= c_ULTIMATE.start_main_~z~0 (bvadd (bvmul (_ bv6 64) c_ULTIMATE.start_main_~n~0) (_ bv6 64)))) (forall ((ULTIMATE.start_main_~a~0 (_ BitVec 16))) (let ((.cse2 ((_ sign_extend 16) ULTIMATE.start_main_~a~0))) (let ((.cse0 ((_ sign_extend 32) .cse2))) (or (not (bvsle c_ULTIMATE.start_main_~n~0 .cse0)) (= (_ bv0 64) (let ((.cse1 ((_ sign_extend 32) (bvmul .cse2 (_ bv6 32))))) (bvadd (bvmul (_ bv12 64) c_ULTIMATE.start_main_~y~0) (bvmul .cse1 c_ULTIMATE.start_main_~x~0) (bvneg (bvmul (bvadd c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0) (bvadd c_ULTIMATE.start_main_~z~0 (_ bv6 64)))) (bvmul .cse1 c_ULTIMATE.start_main_~y~0) (bvmul (_ bv12 64) c_ULTIMATE.start_main_~x~0)))) (bvsle (bvadd (_ bv1 64) c_ULTIMATE.start_main_~n~0) .cse0)))))) is different from true [2021-11-07 01:37:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-07 01:37:28,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33291604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:28,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:37:28,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 8] total 13 [2021-11-07 01:37:28,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174249263] [2021-11-07 01:37:28,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:37:28,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:37:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=93, Unknown=1, NotChecked=20, Total=156 [2021-11-07 01:37:28,663 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:57,926 INFO L93 Difference]: Finished difference Result 139 states and 142 transitions. [2021-11-07 01:38:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:38:57,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 01:38:57,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:57,929 INFO L225 Difference]: With dead ends: 139 [2021-11-07 01:38:57,929 INFO L226 Difference]: Without dead ends: 137 [2021-11-07 01:38:57,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=142, Invalid=323, Unknown=1, NotChecked=40, Total=506 [2021-11-07 01:38:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-07 01:38:57,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2021-11-07 01:38:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 92 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-11-07 01:38:57,946 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 31 [2021-11-07 01:38:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:57,946 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-11-07 01:38:57,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-11-07 01:38:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:38:57,948 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:57,948 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:57,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:58,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-07 01:38:58,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-07 01:38:58,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:58,570 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:38:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:58,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1230314914, now seen corresponding path program 1 times [2021-11-07 01:38:58,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:58,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155121206] [2021-11-07 01:38:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:58,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:58,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:58,572 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:58,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:38:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:38:59,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:00,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 12 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:12,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:12,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155121206] [2021-11-07 01:40:12,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155121206] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:12,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [990896817] [2021-11-07 01:40:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:12,857 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:12,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:12,858 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:12,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:40:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:14,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:40:14,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:15,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:27,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [990896817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:27,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126653081] [2021-11-07 01:40:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:27,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:40:27,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:27,468 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:40:27,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a2cb16-3588-47ec-9fa0-753af020c698/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 01:40:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:28,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:40:28,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:30,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:12,473 WARN L860 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~a~0 (_ BitVec 16))) (let ((.cse2 ((_ sign_extend 16) ULTIMATE.start_main_~a~0))) (let ((.cse0 ((_ sign_extend 32) .cse2)) (.cse1 ((_ sign_extend 32) (bvmul .cse2 (_ bv6 32))))) (or (not (bvsle c_ULTIMATE.start_main_~n~0 .cse0)) (bvsle (bvadd (_ bv1 64) c_ULTIMATE.start_main_~n~0) .cse0) (= (_ bv0 64) (bvadd (bvmul .cse0 c_ULTIMATE.start_main_~z~0) (bvmul (_ bv2 64) c_ULTIMATE.start_main_~z~0) (_ bv2 64) (bvneg (bvadd (bvmul c_ULTIMATE.start_main_~y~0 (_ bv2 64)) (bvmul c_ULTIMATE.start_main_~z~0 (_ bv2 64)))) (bvneg .cse1) (bvmul (_ bv6 64) .cse0))) (not (= (_ bv0 64) (bvadd (bvmul (_ bv12 64) c_ULTIMATE.start_main_~y~0) (bvmul .cse1 c_ULTIMATE.start_main_~x~0) (bvneg (bvmul (bvadd c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0) (bvadd c_ULTIMATE.start_main_~z~0 (_ bv6 64)))) (bvmul .cse1 c_ULTIMATE.start_main_~y~0) (bvmul (_ bv12 64) c_ULTIMATE.start_main_~x~0)))))))) is different from true