./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/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 820aaba80b9c7e4ca2ad4a6a908bac2e6f59545dc6a131cb9fae6306b993a9eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:53:01,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:53:01,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:53:01,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:53:01,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:53:01,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:53:01,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:53:01,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:53:01,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:53:01,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:53:01,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:53:01,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:53:01,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:53:01,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:53:01,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:53:01,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:53:01,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:53:01,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:53:01,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:53:01,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:53:01,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:53:01,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:53:01,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:53:01,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:53:01,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:53:01,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:53:01,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:53:01,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:53:01,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:53:01,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:53:01,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:53:01,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:53:01,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:53:01,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:53:01,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:53:01,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:53:01,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:53:01,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:53:01,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:53:01,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:53:01,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:53:01,530 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:53:01,579 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:53:01,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:53:01,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:53:01,582 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:53:01,582 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:53:01,582 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:53:01,583 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:53:01,583 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:53:01,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:53:01,583 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:53:01,585 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:53:01,585 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:53:01,585 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:53:01,586 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:53:01,586 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:53:01,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:53:01,587 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:53:01,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:53:01,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:53:01,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:53:01,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:53:01,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:53:01,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:53:01,589 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:53:01,589 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:53:01,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:53:01,589 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:53:01,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:53:01,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:53:01,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:53:01,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:53:01,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:53:01,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:53:01,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:53:01,592 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:53:01,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:53:01,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:53:01,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:53:01,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:53:01,593 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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 820aaba80b9c7e4ca2ad4a6a908bac2e6f59545dc6a131cb9fae6306b993a9eb [2021-11-07 01:53:01,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:53:01,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:53:01,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:53:01,930 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:53:01,931 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:53:01,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c [2021-11-07 01:53:02,005 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/data/2906ae177/f1e1bd14afb14508be9b8cb2aadc5aac/FLAG279a3af55 [2021-11-07 01:53:02,550 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:53:02,556 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c [2021-11-07 01:53:02,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/data/2906ae177/f1e1bd14afb14508be9b8cb2aadc5aac/FLAG279a3af55 [2021-11-07 01:53:02,898 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/data/2906ae177/f1e1bd14afb14508be9b8cb2aadc5aac [2021-11-07 01:53:02,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:53:02,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:53:02,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:53:02,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:53:02,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:53:02,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:53:02" (1/1) ... [2021-11-07 01:53:02,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af01cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:02, skipping insertion in model container [2021-11-07 01:53:02,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:53:02" (1/1) ... [2021-11-07 01:53:02,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:53:02,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:53:03,113 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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c[588,601] [2021-11-07 01:53:03,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:53:03,146 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:53:03,159 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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c[588,601] [2021-11-07 01:53:03,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:53:03,185 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:53:03,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03 WrapperNode [2021-11-07 01:53:03,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:53:03,187 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:53:03,187 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:53:03,187 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:53:03,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03" (1/1) ... [2021-11-07 01:53:03,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03" (1/1) ... [2021-11-07 01:53:03,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:53:03,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:53:03,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:53:03,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:53:03,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03" (1/1) ... [2021-11-07 01:53:03,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03" (1/1) ... [2021-11-07 01:53:03,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03" (1/1) ... [2021-11-07 01:53:03,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03" (1/1) ... [2021-11-07 01:53:03,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03" (1/1) ... [2021-11-07 01:53:03,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03" (1/1) ... [2021-11-07 01:53:03,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03" (1/1) ... [2021-11-07 01:53:03,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:53:03,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:53:03,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:53:03,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:53:03,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03" (1/1) ... [2021-11-07 01:53:03,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:53:03,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:03,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:53:03,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:53:03,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:53:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:53:03,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:53:03,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:53:03,695 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:53:03,696 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-11-07 01:53:03,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:03 BoogieIcfgContainer [2021-11-07 01:53:03,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:53:03,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:53:03,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:53:03,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:53:03,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:53:02" (1/3) ... [2021-11-07 01:53:03,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfa11f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:03, skipping insertion in model container [2021-11-07 01:53:03,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:03" (2/3) ... [2021-11-07 01:53:03,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfa11f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:03, skipping insertion in model container [2021-11-07 01:53:03,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:03" (3/3) ... [2021-11-07 01:53:03,708 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound20.c [2021-11-07 01:53:03,714 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:53:03,714 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-07 01:53:03,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:53:03,774 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 01:53:03,775 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-07 01:53:03,792 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 01:53:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:53:03,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:03,799 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:53:03,799 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 01:53:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash 162760247, now seen corresponding path program 1 times [2021-11-07 01:53:03,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:03,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563922805] [2021-11-07 01:53:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:03,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:04,203 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 01:53:04,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:53:04,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563922805] [2021-11-07 01:53:04,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563922805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:04,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:04,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:53:04,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116912293] [2021-11-07 01:53:04,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:53:04,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:53:04,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:53:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:53:04,251 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 01:53:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:04,440 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2021-11-07 01:53:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:04,442 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 01:53:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:04,453 INFO L225 Difference]: With dead ends: 96 [2021-11-07 01:53:04,454 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 01:53:04,460 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 01:53:04,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 01:53:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-11-07 01:53:04,505 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 01:53:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-11-07 01:53:04,510 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 5 [2021-11-07 01:53:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:04,510 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-11-07 01:53:04,511 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 01:53:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-11-07 01:53:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:53:04,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:04,512 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:04,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:53:04,513 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 01:53:04,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:04,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1793930266, now seen corresponding path program 1 times [2021-11-07 01:53:04,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:04,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750864952] [2021-11-07 01:53:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:04,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:04,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:53:04,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635432419] [2021-11-07 01:53:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:04,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:04,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:04,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:04,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:53:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:04,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:53:04,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:04,748 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 01:53:04,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:04,857 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 01:53:04,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:53:04,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750864952] [2021-11-07 01:53:04,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:04,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635432419] [2021-11-07 01:53:04,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635432419] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:04,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:04,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:53:04,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767420017] [2021-11-07 01:53:04,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:53:04,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:53:04,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:53:04,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:53:04,867 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 01:53:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:05,015 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2021-11-07 01:53:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:05,016 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 01:53:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:05,020 INFO L225 Difference]: With dead ends: 85 [2021-11-07 01:53:05,021 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 01:53:05,024 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 01:53:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 01:53:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 48. [2021-11-07 01:53:05,047 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 01:53:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-11-07 01:53:05,051 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 7 [2021-11-07 01:53:05,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:05,052 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-11-07 01:53:05,053 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 01:53:05,053 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-11-07 01:53:05,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:53:05,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:05,055 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:05,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:05,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:05,270 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 01:53:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash -227354147, now seen corresponding path program 1 times [2021-11-07 01:53:05,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:05,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732550427] [2021-11-07 01:53:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:05,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:05,310 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 01:53:05,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:53:05,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732550427] [2021-11-07 01:53:05,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732550427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:05,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:05,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:53:05,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956614392] [2021-11-07 01:53:05,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:53:05,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:53:05,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:53:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:53:05,314 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 01:53:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:05,330 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-07 01:53:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:05,331 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 01:53:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:05,331 INFO L225 Difference]: With dead ends: 70 [2021-11-07 01:53:05,332 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 01:53:05,332 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 01:53:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 01:53:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-07 01:53:05,338 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 01:53:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-07 01:53:05,339 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 8 [2021-11-07 01:53:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:05,339 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-07 01:53:05,340 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 01:53:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-07 01:53:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:53:05,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:05,341 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:05,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:53:05,341 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 01:53:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:05,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1685255837, now seen corresponding path program 1 times [2021-11-07 01:53:05,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:05,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689939078] [2021-11-07 01:53:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:05,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:05,355 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:53:05,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046562698] [2021-11-07 01:53:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:05,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:05,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:05,357 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:05,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:53:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:05,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:53:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:05,505 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 01:53:05,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:05,580 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 01:53:05,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:53:05,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689939078] [2021-11-07 01:53:05,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:05,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046562698] [2021-11-07 01:53:05,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046562698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:05,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:05,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:53:05,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475408758] [2021-11-07 01:53:05,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:53:05,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:53:05,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:53:05,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:53:05,587 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 01:53:05,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:05,695 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-11-07 01:53:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:05,696 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 01:53:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:05,697 INFO L225 Difference]: With dead ends: 83 [2021-11-07 01:53:05,697 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 01:53:05,698 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 01:53:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 01:53:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-11-07 01:53:05,706 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 01:53:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-11-07 01:53:05,707 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 9 [2021-11-07 01:53:05,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:05,708 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-11-07 01:53:05,708 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 01:53:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-11-07 01:53:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:53:05,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:05,709 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:05,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:05,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:05,935 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 01:53:05,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:05,936 INFO L85 PathProgramCache]: Analyzing trace with hash 328345024, now seen corresponding path program 1 times [2021-11-07 01:53:05,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:05,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587621862] [2021-11-07 01:53:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:05,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:05,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:53:05,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842847652] [2021-11-07 01:53:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:05,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:05,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:05,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:06,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:53:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:53:06,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:06,197 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 01:53:06,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:06,317 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 01:53:06,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:53:06,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587621862] [2021-11-07 01:53:06,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:06,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842847652] [2021-11-07 01:53:06,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842847652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:06,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:06,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:53:06,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445127123] [2021-11-07 01:53:06,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:53:06,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:53:06,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:53:06,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:53:06,326 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 01:53:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:06,669 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-11-07 01:53:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:53:06,669 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 01:53:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:06,670 INFO L225 Difference]: With dead ends: 118 [2021-11-07 01:53:06,671 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 01:53:06,671 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 01:53:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 01:53:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-11-07 01:53:06,681 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 01:53:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-11-07 01:53:06,685 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 11 [2021-11-07 01:53:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:06,686 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-11-07 01:53:06,686 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 01:53:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-11-07 01:53:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:53:06,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:06,687 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:06,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:06,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:06,910 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 01:53:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1757696914, now seen corresponding path program 1 times [2021-11-07 01:53:06,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:06,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600784047] [2021-11-07 01:53:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:06,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:06,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:53:06,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530073375] [2021-11-07 01:53:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:06,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:06,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:06,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:06,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:53:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:07,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:53:07,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:07,223 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 01:53:07,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:07,325 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 01:53:07,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:53:07,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600784047] [2021-11-07 01:53:07,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:07,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530073375] [2021-11-07 01:53:07,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530073375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:07,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555690143] [2021-11-07 01:53:07,348 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-07 01:53:07,348 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:53:07,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:53:07,359 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:53:07,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:53:07,393 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,400 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:07,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,401 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:53:07,402 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:07,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:53:07,423 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:53:07,455 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-07 01:53:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,490 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 01:53:07,491 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:07,492 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,493 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:07,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:07,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,522 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 01:53:07,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,523 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:07,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:07,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:07,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:07,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,703 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 01:53:07,705 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:07,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,717 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:07,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:07,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:07,762 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 01:53:07,763 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,766 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:07,768 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:07,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:07,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:07,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,799 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,803 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:53:07,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:53:07,805 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:53:07,812 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:53:07,834 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:53:07,863 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:53:07,879 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,891 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:53:07,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:53:07,924 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:53:07,947 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:07,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 512 [2021-11-07 01:53:07,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:08,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:08,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:08,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:08,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:08,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:08,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:08,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:08,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:08,112 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:08,115 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:08,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:08,124 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:08,127 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:08,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:08,144 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:08,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:08,177 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:08,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:08,191 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:08,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:08,204 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:08,217 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:53:08,224 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:08,227 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:08,231 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:08,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:08,242 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:08,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:08,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:08,266 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:08,273 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:08,283 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:08,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:08,311 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:08,316 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:53:09,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:09,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:53:09,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-07 01:53:09,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709390784] [2021-11-07 01:53:09,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:53:09,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:53:09,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:53:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:53:09,622 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 01:53:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:09,893 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-11-07 01:53:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:53:09,894 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 01:53:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:09,895 INFO L225 Difference]: With dead ends: 85 [2021-11-07 01:53:09,895 INFO L226 Difference]: Without dead ends: 77 [2021-11-07 01:53:09,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:53:09,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-07 01:53:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2021-11-07 01:53:09,909 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 01:53:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-11-07 01:53:09,912 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 19 [2021-11-07 01:53:09,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:09,913 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-11-07 01:53:09,913 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 01:53:09,913 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-11-07 01:53:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:53:09,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:09,914 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 01:53:09,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:10,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:10,127 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 01:53:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1350588059, now seen corresponding path program 1 times [2021-11-07 01:53:10,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:10,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54427921] [2021-11-07 01:53:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:10,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:10,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:53:10,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722282346] [2021-11-07 01:53:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:10,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:10,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:10,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:10,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:53:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:10,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:53:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:10,315 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 01:53:10,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:10,387 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 01:53:10,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:53:10,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54427921] [2021-11-07 01:53:10,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:10,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722282346] [2021-11-07 01:53:10,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722282346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:10,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656027980] [2021-11-07 01:53:10,391 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-07 01:53:10,391 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:53:10,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:53:10,391 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:53:10,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:53:10,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,402 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:10,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:53:10,414 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:10,415 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:53:10,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:53:10,423 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-07 01:53:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,440 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 01:53:10,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,446 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:10,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:10,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:10,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,465 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 01:53:10,465 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:10,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,468 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:10,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:10,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:10,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,523 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 01:53:10,526 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:10,530 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:10,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:10,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:10,560 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 01:53:10,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:10,564 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:10,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:10,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:10,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,587 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:53:10,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:53:10,608 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:53:10,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:53:10,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,635 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:53:10,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:53:10,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,668 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:53:10,674 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,683 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:53:10,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:53:10,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,727 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 418 [2021-11-07 01:53:10,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:10,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:10,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:10,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:10,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:10,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:10,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:10,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:10,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:10,806 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:10,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:10,810 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:10,816 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:10,825 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:10,833 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:10,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,847 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:10,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,862 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 381 [2021-11-07 01:53:10,869 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:10,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:10,874 INFO L180 QuantifierPusher]: treesize reduction 4, result has 93.4 percent of original size [2021-11-07 01:53:10,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-07 01:53:10,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-07 01:53:10,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:10,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:10,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:10,985 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:10,994 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:11,003 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:11,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:11,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:11,029 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:53:17,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:17,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:53:17,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-07 01:53:17,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597273929] [2021-11-07 01:53:17,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:53:17,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:53:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:53:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:53:17,883 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 01:53:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:17,943 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2021-11-07 01:53:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:53:17,944 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 01:53:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:17,945 INFO L225 Difference]: With dead ends: 143 [2021-11-07 01:53:17,945 INFO L226 Difference]: Without dead ends: 115 [2021-11-07 01:53:17,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:53:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-07 01:53:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2021-11-07 01:53:17,960 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 01:53:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-11-07 01:53:17,962 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 20 [2021-11-07 01:53:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:17,962 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-11-07 01:53:17,962 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 01:53:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-11-07 01:53:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:53:17,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:17,963 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:17,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:18,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 01:53:18,171 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 01:53:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1224742933, now seen corresponding path program 1 times [2021-11-07 01:53:18,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:18,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106710508] [2021-11-07 01:53:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:18,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:18,181 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:53:18,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018999999] [2021-11-07 01:53:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:18,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:18,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:18,183 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:18,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:53:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:53:18,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:18,513 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 01:53:18,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:18,620 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 01:53:18,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:53:18,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106710508] [2021-11-07 01:53:18,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:18,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018999999] [2021-11-07 01:53:18,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018999999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:18,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [772515596] [2021-11-07 01:53:18,626 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-07 01:53:18,626 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:53:18,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:53:18,627 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:53:18,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:53:18,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,644 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:18,645 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,645 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:53:18,646 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:18,646 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,647 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:53:18,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:53:18,673 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-07 01:53:18,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,696 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 01:53:18,697 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,697 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:18,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:18,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:18,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,725 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 01:53:18,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,727 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:18,732 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,732 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:18,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:18,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:18,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,779 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 01:53:18,781 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:18,784 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:18,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:18,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:18,816 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 01:53:18,817 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:18,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:18,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:18,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:18,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,840 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:53:18,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:53:18,845 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:53:18,849 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,855 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:53:18,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:53:18,872 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:53:18,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,891 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:53:18,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:53:18,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:53:18,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:18,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 427 [2021-11-07 01:53:18,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:18,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:18,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:18,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:18,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:18,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:18,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:18,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:18,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:19,005 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:19,006 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:19,009 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:19,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:19,014 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:19,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:19,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:19,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:19,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:19,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:19,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:19,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:19,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:19,054 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 340 [2021-11-07 01:53:19,060 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:19,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:19,065 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:19,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:19,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:19,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:19,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:19,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:19,093 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:19,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:19,111 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:19,115 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:19,120 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:53:20,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:20,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:53:20,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-07 01:53:20,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609484337] [2021-11-07 01:53:20,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:53:20,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:53:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:53:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:53:20,262 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 01:53:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:20,383 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2021-11-07 01:53:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:53:20,384 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 01:53:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:20,384 INFO L225 Difference]: With dead ends: 91 [2021-11-07 01:53:20,384 INFO L226 Difference]: Without dead ends: 89 [2021-11-07 01:53:20,385 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 01:53:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-07 01:53:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2021-11-07 01:53:20,396 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 01:53:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-11-07 01:53:20,397 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 21 [2021-11-07 01:53:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:20,397 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-11-07 01:53:20,398 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 01:53:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-11-07 01:53:20,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:53:20,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:20,399 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 01:53:20,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:20,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:20,611 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 01:53:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2066530638, now seen corresponding path program 1 times [2021-11-07 01:53:20,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:20,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825239557] [2021-11-07 01:53:20,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:20,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:20,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:53:20,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465332859] [2021-11-07 01:53:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:20,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:20,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:20,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 01:53:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:20,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:53:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:21,189 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 01:53:21,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:21,766 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 01:53:21,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:53:21,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825239557] [2021-11-07 01:53:21,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:21,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465332859] [2021-11-07 01:53:21,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465332859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:21,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [759796454] [2021-11-07 01:53:21,771 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-07 01:53:21,772 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:53:21,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:53:21,772 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:53:21,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:53:21,786 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,788 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:21,788 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,789 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:53:21,789 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:21,789 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:53:21,806 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:53:21,812 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-07 01:53:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,834 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 01:53:21,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:21,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,836 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:21,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,854 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 01:53:21,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,855 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:21,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,857 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:21,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:21,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:21,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,902 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 01:53:21,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:21,905 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:21,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:21,929 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 01:53:21,930 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,931 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:21,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:21,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:21,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:21,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,951 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:53:21,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:53:21,952 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:53:21,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:53:21,965 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,975 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:53:21,981 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,988 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:53:21,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:21,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:53:22,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:53:22,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,023 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:53:22,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 517 [2021-11-07 01:53:22,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:22,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:22,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:22,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:22,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:22,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:22,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:22,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:22,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:22,113 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:22,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:22,116 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,118 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:22,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:22,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,141 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:22,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:22,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:22,161 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-07 01:53:22,178 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:22,180 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:22,183 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:22,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:22,203 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:22,213 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:22,222 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:22,235 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-07 01:53:22,246 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:22,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-11-07 01:53:22,260 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:53:25,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:25,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:53:25,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 01:53:25,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217882150] [2021-11-07 01:53:25,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:53:25,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:53:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:53:25,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:53:25,159 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 01:53:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:26,241 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-11-07 01:53:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:53:26,242 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 01:53:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:26,243 INFO L225 Difference]: With dead ends: 111 [2021-11-07 01:53:26,243 INFO L226 Difference]: Without dead ends: 109 [2021-11-07 01:53:26,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:53:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-07 01:53:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-11-07 01:53:26,258 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 01:53:26,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2021-11-07 01:53:26,272 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 30 [2021-11-07 01:53:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:26,272 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2021-11-07 01:53:26,273 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 01:53:26,273 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2021-11-07 01:53:26,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:53:26,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:26,275 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 01:53:26,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:26,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:26,503 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 01:53:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1660894443, now seen corresponding path program 1 times [2021-11-07 01:53:26,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:26,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377450369] [2021-11-07 01:53:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:26,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:26,518 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:53:26,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118133163] [2021-11-07 01:53:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:26,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:26,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:26,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:26,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:53:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:26,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:53:26,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:27,245 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 01:53:27,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:27,776 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 01:53:27,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:53:27,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377450369] [2021-11-07 01:53:27,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:27,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118133163] [2021-11-07 01:53:27,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118133163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:27,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1200264629] [2021-11-07 01:53:27,785 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-07 01:53:27,785 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:53:27,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:53:27,786 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:53:27,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:53:27,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,796 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:27,798 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:53:27,799 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:27,799 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:53:27,809 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:53:27,814 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-07 01:53:27,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,835 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 01:53:27,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,836 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:27,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:27,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:27,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,859 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 01:53:27,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:27,861 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:27,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:27,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:27,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,901 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 01:53:27,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:27,906 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,906 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:27,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:27,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:27,935 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 01:53:27,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:27,938 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:27,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:27,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:27,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,964 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:53:27,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:53:27,968 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:53:27,983 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,988 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:53:27,992 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:27,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:53:28,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:53:28,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:53:28,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:53:28,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:53:28,049 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 477 [2021-11-07 01:53:28,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:28,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:28,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:28,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:28,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:28,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:28,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:28,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:28,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:28,116 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:28,117 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:28,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:28,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:28,131 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:28,138 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:28,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:28,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-07 01:53:28,165 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:28,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:28,169 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,171 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:28,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,178 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:28,183 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,187 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:28,193 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:28,202 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,205 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:28,212 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-07 01:53:28,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,232 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-11-07 01:53:28,239 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:28,243 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 170 [2021-11-07 01:53:28,256 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:53:30,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1200264629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:30,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:53:30,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 5] total 19 [2021-11-07 01:53:30,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903876742] [2021-11-07 01:53:30,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:53:30,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:53:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:53:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:53:30,724 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 01:53:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:31,341 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-11-07 01:53:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:53:31,341 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 01:53:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:31,342 INFO L225 Difference]: With dead ends: 107 [2021-11-07 01:53:31,342 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 01:53:31,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:53:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 01:53:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-11-07 01:53:31,355 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 01:53:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-11-07 01:53:31,356 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 32 [2021-11-07 01:53:31,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:31,356 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-11-07 01:53:31,357 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 01:53:31,357 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-11-07 01:53:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:53:31,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:31,358 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-07 01:53:31,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:31,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-07 01:53:31,576 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 01:53:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:31,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1934542221, now seen corresponding path program 2 times [2021-11-07 01:53:31,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:31,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126361622] [2021-11-07 01:53:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:31,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:31,598 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:53:31,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963456159] [2021-11-07 01:53:31,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:53:31,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:31,604 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:31,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 01:53:31,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:53:31,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:53:31,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 01:53:31,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:48,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:53:48,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126361622] [2021-11-07 01:53:48,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:53:48,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963456159] [2021-11-07 01:53:48,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~n~0] [2021-11-07 01:53:48,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [372963114] [2021-11-07 01:53:48,887 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-07 01:53:48,887 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:53:48,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:53:48,887 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:53:48,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:53:48,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:48,894 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:48,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:48,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:53:48,896 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:53:48,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:48,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:53:48,906 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 01:53:48,910 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-07 01:53:48,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:48,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:48,935 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 01:53:48,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:48,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:48,937 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:48,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:48,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:48,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:48,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:48,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:48,965 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 01:53:48,965 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:48,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:48,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:48,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:53:48,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:48,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:48,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:48,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:48,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:48,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:48,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:48,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,025 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 01:53:49,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:49,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:49,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:49,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:49,063 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 01:53:49,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:49,068 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:53:49,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-07 01:53:49,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:49,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,087 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-07 01:53:49,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:53:49,088 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:301, output treesize:251 [2021-11-07 01:53:49,092 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-07 01:53:49,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 286 [2021-11-07 01:53:49,116 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-07 01:53:49,127 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,133 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-07 01:53:49,140 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 329 [2021-11-07 01:53:49,152 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,160 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-07 01:53:49,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,184 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 583 [2021-11-07 01:53:49,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:49,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:49,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:49,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:49,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:49,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:49,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:49,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:49,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:53:49,240 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:49,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:49,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,246 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:49,249 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:49,256 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:49,265 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,269 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:49,273 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,278 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:49,281 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-11-07 01:53:49,295 INFO L180 QuantifierPusher]: treesize reduction 30, result has 66.7 percent of original size [2021-11-07 01:53:49,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-11-07 01:53:49,300 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,302 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:53:49,308 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-07 01:53:49,318 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,323 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 01:53:49,333 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,337 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-07 01:53:49,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:53:49,349 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-07 01:53:49,354 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:54:19,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:54:19,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:19,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 01:54:19,217 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-07 01:54:19,217 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 01:54:19,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:54:19,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:54:19,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:54:19,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:54:19,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:54:19,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:54:19,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:54:19,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:54:19,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:54:19,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:54:19,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:54:19,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:19,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-07 01:54:19,428 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:19,430 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:54:19,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:54:19 BoogieIcfgContainer [2021-11-07 01:54:19,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:54:19,445 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:54:19,445 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:54:19,445 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:54:19,445 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:03" (3/4) ... [2021-11-07 01:54:19,448 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:54:19,449 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:54:19,449 INFO L168 Benchmark]: Toolchain (without parser) took 76544.11 ms. Allocated memory was 90.2 MB in the beginning and 174.1 MB in the end (delta: 83.9 MB). Free memory was 55.6 MB in the beginning and 142.7 MB in the end (delta: -87.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:54:19,450 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory was 59.9 MB in the beginning and 59.8 MB in the end (delta: 21.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:54:19,450 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.80 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 55.3 MB in the beginning and 94.5 MB in the end (delta: -39.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:54:19,450 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.58 ms. Allocated memory is still 119.5 MB. Free memory was 94.5 MB in the beginning and 93.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:54:19,450 INFO L168 Benchmark]: Boogie Preprocessor took 26.30 ms. Allocated memory is still 119.5 MB. Free memory was 93.2 MB in the beginning and 91.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:54:19,451 INFO L168 Benchmark]: RCFGBuilder took 445.13 ms. Allocated memory is still 119.5 MB. Free memory was 91.7 MB in the beginning and 79.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:54:19,451 INFO L168 Benchmark]: TraceAbstraction took 75743.10 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 78.5 MB in the beginning and 142.7 MB in the end (delta: -64.2 MB). Peak memory consumption was 88.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:54:19,451 INFO L168 Benchmark]: Witness Printer took 4.26 ms. Allocated memory is still 174.1 MB. Free memory is still 142.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:54:19,452 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory was 59.9 MB in the beginning and 59.8 MB in the end (delta: 21.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.80 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 55.3 MB in the beginning and 94.5 MB in the end (delta: -39.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.58 ms. Allocated memory is still 119.5 MB. Free memory was 94.5 MB in the beginning and 93.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.30 ms. Allocated memory is still 119.5 MB. Free memory was 93.2 MB in the beginning and 91.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 445.13 ms. Allocated memory is still 119.5 MB. Free memory was 91.7 MB in the beginning and 79.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 75743.10 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 78.5 MB in the beginning and 142.7 MB in the end (delta: -64.2 MB). Peak memory consumption was 88.8 MB. Max. memory is 16.1 GB. * Witness Printer took 4.26 ms. Allocated memory is still 174.1 MB. Free memory is still 142.7 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++<20 [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++<20 [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++<20 [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: 75.6s, OverallIterations: 11, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 289 SDtfs, 530 SDslu, 774 SDs, 0 SdLazy, 813 SolverSat, 150 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 431 GetRequests, 274 SyntacticMatches, 40 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 15.5s 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, 20.6s 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]: 471, 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]: 361, 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]: 350, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 174, FLUID_QUERY_TIME[ms]: 3, 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]: 48, 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]: 194, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 194, 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]: 1, PATH_EXPR_TIME[ms]: 1, 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 01:54:19,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/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 820aaba80b9c7e4ca2ad4a6a908bac2e6f59545dc6a131cb9fae6306b993a9eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:54:22,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:54:22,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:54:22,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:54:22,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:54:22,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:54:22,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:54:22,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:54:22,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:54:22,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:54:22,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:54:22,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:54:22,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:54:22,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:54:22,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:54:22,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:54:22,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:54:22,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:54:22,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:54:22,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:54:22,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:54:22,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:54:22,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:54:22,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:54:22,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:54:22,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:54:22,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:54:22,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:54:22,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:54:22,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:54:22,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:54:22,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:54:22,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:54:22,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:54:22,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:54:22,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:54:22,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:54:22,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:54:22,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:54:22,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:54:22,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:54:22,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:54:22,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:54:22,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:54:22,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:54:22,429 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:54:22,429 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:54:22,430 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:54:22,430 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:54:22,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:54:22,430 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:54:22,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:54:22,433 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:54:22,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:54:22,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:54:22,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:54:22,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:54:22,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:54:22,435 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:54:22,435 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:54:22,435 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:54:22,436 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:54:22,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:54:22,436 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:54:22,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:54:22,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:54:22,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:54:22,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:54:22,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:54:22,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:54:22,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:54:22,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:54:22,438 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:54:22,438 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:22,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:54:22,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:54:22,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:54:22,440 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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 820aaba80b9c7e4ca2ad4a6a908bac2e6f59545dc6a131cb9fae6306b993a9eb [2021-11-07 01:54:22,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:54:22,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:54:22,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:54:22,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:54:22,883 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:54:22,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c [2021-11-07 01:54:22,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/data/5e5ff871c/e079a52e4bab4db7abf6aece48f37ff1/FLAG4ebd3ae9f [2021-11-07 01:54:23,615 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:54:23,620 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c [2021-11-07 01:54:23,627 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/data/5e5ff871c/e079a52e4bab4db7abf6aece48f37ff1/FLAG4ebd3ae9f [2021-11-07 01:54:23,964 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/data/5e5ff871c/e079a52e4bab4db7abf6aece48f37ff1 [2021-11-07 01:54:23,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:54:23,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:54:23,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:54:23,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:54:23,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:54:23,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:54:23" (1/1) ... [2021-11-07 01:54:23,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e457355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:23, skipping insertion in model container [2021-11-07 01:54:23,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:54:23" (1/1) ... [2021-11-07 01:54:23,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:54:24,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:54:24,162 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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c[588,601] [2021-11-07 01:54:24,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:54:24,203 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:54:24,232 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_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c[588,601] [2021-11-07 01:54:24,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:54:24,267 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:54:24,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24 WrapperNode [2021-11-07 01:54:24,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:54:24,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:54:24,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:54:24,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:54:24,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24" (1/1) ... [2021-11-07 01:54:24,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24" (1/1) ... [2021-11-07 01:54:24,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:54:24,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:54:24,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:54:24,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:54:24,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24" (1/1) ... [2021-11-07 01:54:24,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24" (1/1) ... [2021-11-07 01:54:24,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24" (1/1) ... [2021-11-07 01:54:24,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24" (1/1) ... [2021-11-07 01:54:24,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24" (1/1) ... [2021-11-07 01:54:24,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24" (1/1) ... [2021-11-07 01:54:24,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24" (1/1) ... [2021-11-07 01:54:24,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:54:24,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:54:24,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:54:24,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:54:24,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24" (1/1) ... [2021-11-07 01:54:24,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:54:24,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:54:24,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:54:24,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:54:24,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:54:24,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:54:24,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:54:24,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:54:26,448 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:54:26,448 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-11-07 01:54:26,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:54:26 BoogieIcfgContainer [2021-11-07 01:54:26,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:54:26,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:54:26,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:54:26,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:54:26,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:54:23" (1/3) ... [2021-11-07 01:54:26,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ef7ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:54:26, skipping insertion in model container [2021-11-07 01:54:26,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:24" (2/3) ... [2021-11-07 01:54:26,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ef7ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:54:26, skipping insertion in model container [2021-11-07 01:54:26,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:54:26" (3/3) ... [2021-11-07 01:54:26,461 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound20.c [2021-11-07 01:54:26,467 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:54:26,468 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-07 01:54:26,519 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:54:26,526 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 01:54:26,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-07 01:54:26,542 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 01:54:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:54:26,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:26,548 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:54:26,549 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 01:54:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:26,555 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-11-07 01:54:26,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:26,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546916804] [2021-11-07 01:54:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:26,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:26,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:26,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:54:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:26,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:54:26,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:26,797 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 01:54:26,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:26,915 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 01:54:26,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:26,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546916804] [2021-11-07 01:54:26,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546916804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:26,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:26,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:26,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211867685] [2021-11-07 01:54:26,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:26,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:26,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:26,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:26,950 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 01:54:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:31,695 INFO L93 Difference]: Finished difference Result 145 states and 184 transitions. [2021-11-07 01:54:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:54:31,698 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 01:54:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:31,708 INFO L225 Difference]: With dead ends: 145 [2021-11-07 01:54:31,708 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 01:54:31,711 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 01:54:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 01:54:31,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 44. [2021-11-07 01:54:31,744 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 01:54:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-07 01:54:31,746 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 6 [2021-11-07 01:54:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:31,747 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-07 01:54:31,747 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 01:54:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-07 01:54:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:54:31,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:31,748 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:31,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:54:31,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:31,949 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 01:54:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-11-07 01:54:31,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:31,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862786753] [2021-11-07 01:54:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:31,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:31,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:31,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:31,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:54:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:32,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:54:32,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:32,173 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 01:54:32,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:33,569 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 01:54:33,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:33,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862786753] [2021-11-07 01:54:33,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862786753] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:33,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:33,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:33,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090994064] [2021-11-07 01:54:33,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:33,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:33,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:33,575 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 01:54:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:37,054 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-11-07 01:54:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:54:37,075 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 01:54:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:37,076 INFO L225 Difference]: With dead ends: 87 [2021-11-07 01:54:37,077 INFO L226 Difference]: Without dead ends: 85 [2021-11-07 01:54:37,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:54:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-07 01:54:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 49. [2021-11-07 01:54:37,092 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 01:54:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-07 01:54:37,093 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 8 [2021-11-07 01:54:37,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:37,094 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-07 01:54:37,094 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 01:54:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-07 01:54:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:54:37,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:37,096 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:37,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:37,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:37,310 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 01:54:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:37,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1269812074, now seen corresponding path program 1 times [2021-11-07 01:54:37,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:37,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896689188] [2021-11-07 01:54:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:37,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:37,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:37,322 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:37,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:54:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:37,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:54:37,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:37,546 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 01:54:37,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:37,629 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 01:54:37,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:37,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896689188] [2021-11-07 01:54:37,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896689188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:37,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:37,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:54:37,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31934181] [2021-11-07 01:54:37,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:37,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:37,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:37,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:37,632 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 01:54:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:37,722 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-11-07 01:54:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:54:37,723 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 01:54:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:37,725 INFO L225 Difference]: With dead ends: 108 [2021-11-07 01:54:37,725 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 01:54:37,726 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 01:54:37,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 01:54:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2021-11-07 01:54:37,742 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 01:54:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-11-07 01:54:37,743 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 9 [2021-11-07 01:54:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:37,744 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-11-07 01:54:37,744 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 01:54:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-11-07 01:54:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:54:37,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:37,745 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:37,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:37,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:37,951 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 01:54:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-11-07 01:54:37,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:37,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827509354] [2021-11-07 01:54:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:37,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:37,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:37,954 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:37,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:54:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:38,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:54:38,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:38,267 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 01:54:38,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:42,365 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 01:54:42,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:42,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827509354] [2021-11-07 01:54:42,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827509354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:42,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:42,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:42,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269280443] [2021-11-07 01:54:42,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:42,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:42,368 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 01:54:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:46,038 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-11-07 01:54:46,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:54:46,066 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 01:54:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:46,067 INFO L225 Difference]: With dead ends: 86 [2021-11-07 01:54:46,067 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 01:54:46,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:54:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 01:54:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2021-11-07 01:54:46,079 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 01:54:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-11-07 01:54:46,081 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-11-07 01:54:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:46,081 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-11-07 01:54:46,081 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 01:54:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-11-07 01:54:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:54:46,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:46,082 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:46,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:46,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:46,288 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 01:54:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash -828134125, now seen corresponding path program 1 times [2021-11-07 01:54:46,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:46,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515531178] [2021-11-07 01:54:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:46,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:46,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:46,306 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:46,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:54:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:46,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:54:46,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:46,801 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 01:54:46,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:49,279 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 01:54:49,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:49,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515531178] [2021-11-07 01:54:49,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515531178] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:49,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:49,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:49,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150285807] [2021-11-07 01:54:49,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:49,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:49,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:49,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:49,282 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 01:55:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:01,703 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2021-11-07 01:55:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:55:01,703 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 01:55:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:01,705 INFO L225 Difference]: With dead ends: 118 [2021-11-07 01:55:01,705 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 01:55:01,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:55:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 01:55:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2021-11-07 01:55:01,720 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 01:55:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-11-07 01:55:01,721 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 12 [2021-11-07 01:55:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:01,722 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-11-07 01:55:01,722 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 01:55:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-11-07 01:55:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:55:01,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:01,723 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:01,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:01,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:01,942 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 01:55:01,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:01,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1416701979, now seen corresponding path program 1 times [2021-11-07 01:55:01,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:01,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635350935] [2021-11-07 01:55:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:01,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:01,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:01,944 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:01,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:55:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:02,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:55:02,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:02,729 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 01:55:02,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:06,929 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 01:55:06,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:06,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635350935] [2021-11-07 01:55:06,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635350935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:06,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [686213972] [2021-11-07 01:55:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:06,932 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:06,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:06,934 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:06,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:55:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:07,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:55:07,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:08,046 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 01:55:08,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:10,766 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 01:55:10,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [686213972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:10,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27778453] [2021-11-07 01:55:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:10,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:55:10,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:55:10,769 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:55:10,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:55:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:11,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:55:11,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:11,686 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 01:55:11,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:34,826 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 01:55:34,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27778453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:34,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:55:34,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 8, 8] total 15 [2021-11-07 01:55:34,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846585316] [2021-11-07 01:55:34,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:55:34,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:34,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:55:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=135, Unknown=7, NotChecked=0, Total=210 [2021-11-07 01:55:34,829 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 01:57:12,740 WARN L207 SmtUtils]: Spent 10.39 s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-07 01:59:09,077 WARN L207 SmtUtils]: Spent 8.54 s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-07 01:59:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:21,973 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2021-11-07 01:59:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:59:21,974 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 01:59:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:21,976 INFO L225 Difference]: With dead ends: 161 [2021-11-07 01:59:21,976 INFO L226 Difference]: Without dead ends: 153 [2021-11-07 01:59:21,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=204, Invalid=380, Unknown=16, NotChecked=0, Total=600 [2021-11-07 01:59:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-07 01:59:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 93. [2021-11-07 01:59:21,998 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 01:59:21,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-11-07 01:59:21,999 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 20 [2021-11-07 01:59:21,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:22,000 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-11-07 01:59:22,000 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 01:59:22,000 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-11-07 01:59:22,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:59:22,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:22,001 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:22,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:22,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:22,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:22,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:59:22,618 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 01:59:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash 54186920, now seen corresponding path program 1 times [2021-11-07 01:59:22,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:22,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15390753] [2021-11-07 01:59:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:22,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:22,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:22,621 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:22,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:59:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:23,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:59:23,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:23,484 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 01:59:23,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:34,198 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 01:59:34,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:34,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15390753] [2021-11-07 01:59:34,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15390753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:34,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [581348708] [2021-11-07 01:59:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:34,199 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:34,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:59:34,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:59:34,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:59:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:35,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:59:35,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:35,430 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 01:59:35,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:43,175 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 01:59:43,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [581348708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:43,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056677748] [2021-11-07 01:59:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:43,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:59:43,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:59:43,181 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:59:43,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 01:59:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:43,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:59:43,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:43,977 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 01:59:43,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:53,372 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 01:59:53,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056677748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:53,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:59:53,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 10 [2021-11-07 01:59:53,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844518540] [2021-11-07 01:59:53,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:59:53,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:59:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:59:53,375 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 02:00:18,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:18,843 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2021-11-07 02:00:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:00:18,843 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 02:00:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:18,844 INFO L225 Difference]: With dead ends: 127 [2021-11-07 02:00:18,844 INFO L226 Difference]: Without dead ends: 121 [2021-11-07 02:00:18,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:00:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-07 02:00:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 91. [2021-11-07 02:00:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 90 states have internal predecessors, (99), 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 02:00:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-11-07 02:00:18,860 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 22 [2021-11-07 02:00:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:18,860 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-11-07 02:00:18,861 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 02:00:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-11-07 02:00:18,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 02:00:18,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:18,862 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 02:00:18,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:19,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:19,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:19,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:00:19,467 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 02:00:19,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:19,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1750673281, now seen corresponding path program 1 times [2021-11-07 02:00:19,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:19,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054966465] [2021-11-07 02:00:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:19,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:19,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:19,470 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:19,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:00:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:20,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:00:20,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:21,084 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 02:00:21,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:14,121 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 02:01:14,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:14,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054966465] [2021-11-07 02:01:14,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054966465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:14,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1259098464] [2021-11-07 02:01:14,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:14,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:14,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:14,128 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:14,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 02:01:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:15,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:01:15,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:16,380 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 02:01:16,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:05,714 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 02:02:05,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1259098464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:05,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913165615] [2021-11-07 02:02:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:05,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:02:05,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:02:05,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:02:05,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 02:02:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:06,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:02:06,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:07,477 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 02:02:07,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:14,625 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 02:03:24,125 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 02:03:24,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913165615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:03:24,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:03:24,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 8] total 13 [2021-11-07 02:03:24,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198870043] [2021-11-07 02:03:24,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:03:24,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:24,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:03:24,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=93, Unknown=1, NotChecked=20, Total=156 [2021-11-07 02:03:24,129 INFO L87 Difference]: Start difference. First operand 91 states and 99 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 02:04:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:53,317 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2021-11-07 02:04:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:04:53,318 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 02:04:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:53,319 INFO L225 Difference]: With dead ends: 141 [2021-11-07 02:04:53,319 INFO L226 Difference]: Without dead ends: 139 [2021-11-07 02:04:53,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=142, Invalid=323, Unknown=1, NotChecked=40, Total=506 [2021-11-07 02:04:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-07 02:04:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 95. [2021-11-07 02:04:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.186046511627907) internal successors, (102), 94 states have internal predecessors, (102), 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 02:04:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-11-07 02:04:53,335 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 31 [2021-11-07 02:04:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:53,335 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-11-07 02:04:53,335 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 02:04:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-11-07 02:04:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 02:04:53,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:53,337 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 02:04:53,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:53,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:53,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:53,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:53,940 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 02:04:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:53,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1230314914, now seen corresponding path program 1 times [2021-11-07 02:04:53,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:53,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012626916] [2021-11-07 02:04:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:53,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:53,942 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:53,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:04:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:54,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:04:54,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:55,673 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 02:04:55,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:56,461 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 02:05:56,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:56,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012626916] [2021-11-07 02:05:56,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012626916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:56,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448010894] [2021-11-07 02:05:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:56,462 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:56,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:56,463 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:56,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:05:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:58,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:05:58,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:59,403 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 02:05:59,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:09,915 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 02:06:09,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1448010894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:09,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098081968] [2021-11-07 02:06:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:09,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:06:09,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:09,917 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:06:09,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d6cf3c4-661f-4093-87d3-dfdbd1f43758/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 02:06:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:10,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 02:06:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:12,887 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 02:06:12,887 INFO L328 TraceCheckSpWp]: Computing backward predicates...