./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/Mono6_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono6_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:26:41,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:26:41,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:26:41,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:26:41,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:26:41,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:26:41,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:26:41,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:26:41,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:26:41,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:26:41,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:26:41,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:26:41,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:26:41,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:26:41,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:26:41,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:26:41,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:26:41,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:26:41,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:26:41,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:26:41,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:26:41,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:26:41,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:26:41,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:26:41,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:26:41,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:26:41,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:26:41,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:26:41,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:26:41,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:26:41,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:26:41,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:26:41,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:26:41,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:26:41,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:26:41,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:26:41,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:26:41,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:26:41,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:26:41,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:26:41,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:26:41,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:26:41,641 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:26:41,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:26:41,643 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:26:41,643 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:26:41,644 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:26:41,644 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:26:41,650 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:26:41,651 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:26:41,651 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:26:41,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:26:41,652 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:26:41,653 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:26:41,653 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:26:41,653 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:26:41,653 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:26:41,654 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:26:41,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:26:41,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:26:41,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:26:41,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:26:41,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:26:41,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:26:41,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:26:41,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:26:41,656 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:26:41,657 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:26:41,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:26:41,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:26:41,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:26:41,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:26:41,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:26:41,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:26:41,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:26:41,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:26:41,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:26:41,661 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:26:41,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:26:41,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:26:41,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:26:41,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:26:41,662 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_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 [2021-11-12 22:26:41,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:26:42,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:26:42,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:26:42,015 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:26:42,016 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:26:42,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2021-11-12 22:26:42,122 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/data/f56d1b6cb/9c6ddaba56ab4d0b872dac96dd7d5ee3/FLAG90aad6ee2 [2021-11-12 22:26:42,584 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:26:42,585 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2021-11-12 22:26:42,600 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/data/f56d1b6cb/9c6ddaba56ab4d0b872dac96dd7d5ee3/FLAG90aad6ee2 [2021-11-12 22:26:42,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/data/f56d1b6cb/9c6ddaba56ab4d0b872dac96dd7d5ee3 [2021-11-12 22:26:42,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:26:42,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:26:42,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:26:42,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:26:42,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:26:42,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:26:42" (1/1) ... [2021-11-12 22:26:42,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b83e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:42, skipping insertion in model container [2021-11-12 22:26:42,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:26:42" (1/1) ... [2021-11-12 22:26:43,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:26:43,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:26:43,198 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_9eab028a-e020-4257-af94-0c78f082eacb/sv-benchmarks/c/loops-crafted-1/Mono6_1.c[311,324] [2021-11-12 22:26:43,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:26:43,218 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:26:43,230 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_9eab028a-e020-4257-af94-0c78f082eacb/sv-benchmarks/c/loops-crafted-1/Mono6_1.c[311,324] [2021-11-12 22:26:43,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:26:43,247 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:26:43,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43 WrapperNode [2021-11-12 22:26:43,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:26:43,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:26:43,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:26:43,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:26:43,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:26:43,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:26:43,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:26:43,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:26:43,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:26:43,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:26:43,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:26:43,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:26:43,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:26:43,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:26:43,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:26:43,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:26:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:26:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:26:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:26:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:26:43,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:26:43,608 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:26:43,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:26:43 BoogieIcfgContainer [2021-11-12 22:26:43,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:26:43,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:26:43,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:26:43,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:26:43,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:26:42" (1/3) ... [2021-11-12 22:26:43,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e12ef06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:26:43, skipping insertion in model container [2021-11-12 22:26:43,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (2/3) ... [2021-11-12 22:26:43,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e12ef06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:26:43, skipping insertion in model container [2021-11-12 22:26:43,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:26:43" (3/3) ... [2021-11-12 22:26:43,621 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2021-11-12 22:26:43,627 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:26:43,627 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:26:43,699 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:26:43,712 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:26:43,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:26:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2021-11-12 22:26:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 22:26:43,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:43,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 22:26:43,747 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:43,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2065030, now seen corresponding path program 1 times [2021-11-12 22:26:43,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:43,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659014998] [2021-11-12 22:26:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:43,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:44,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:44,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659014998] [2021-11-12 22:26:44,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659014998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:44,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:44,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:26:44,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569150351] [2021-11-12 22:26:44,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:44,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:26:44,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:44,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:26:44,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:44,231 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-12 22:26:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:44,259 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-12 22:26:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:26:44,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-12 22:26:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:44,270 INFO L225 Difference]: With dead ends: 13 [2021-11-12 22:26:44,270 INFO L226 Difference]: Without dead ends: 6 [2021-11-12 22:26:44,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:44,277 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.45ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:44,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.45ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 12.98ms Time] [2021-11-12 22:26:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-12 22:26:44,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-12 22:26:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-11-12 22:26:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-12 22:26:44,308 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-12 22:26:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:44,309 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-12 22:26:44,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-12 22:26:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-12 22:26:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 22:26:44,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:44,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 22:26:44,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:26:44,311 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash 64119683, now seen corresponding path program 1 times [2021-11-12 22:26:44,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:44,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371227770] [2021-11-12 22:26:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:44,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:44,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:44,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371227770] [2021-11-12 22:26:44,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371227770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:44,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228015392] [2021-11-12 22:26:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:44,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:26:44,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:26:44,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:26:44,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:26:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:44,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:26:44,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:44,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:44,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228015392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:44,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507814438] [2021-11-12 22:26:44,939 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:26:44,940 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:26:44,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:26:44,954 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:26:44,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:26:44,995 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,007 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:26:45,009 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:26:45,013 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:26:45,013 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:26:45,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-12 22:26:45,049 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-12 22:26:45,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,083 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 [2021-11-12 22:26:45,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:26:45,087 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,088 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:26:45,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:26:45,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:45,200 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 [2021-11-12 22:26:45,201 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,206 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:26:45,222 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:26:45,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:26:45,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,257 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,259 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-12 22:26:45,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:26:45,261 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-12 22:26:45,267 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,271 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-12 22:26:45,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,388 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,404 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:26:45,409 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,412 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:26:45,469 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 515 [2021-11-12 22:26:45,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:26:45,602 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.6 percent of original size [2021-11-12 22:26:45,612 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:26:45,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:26:45,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:26:45,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-12 22:26:45,628 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:26:46,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:26:46,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:26:46,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2021-11-12 22:26:46,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930063511] [2021-11-12 22:26:46,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:26:46,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:26:46,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:46,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:26:46,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:26:46,014 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 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) [2021-11-12 22:26:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:48,099 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-11-12 22:26:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:26:48,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 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 5 [2021-11-12 22:26:48,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:48,100 INFO L225 Difference]: With dead ends: 14 [2021-11-12 22:26:48,100 INFO L226 Difference]: Without dead ends: 9 [2021-11-12 22:26:48,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:26:48,103 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.68ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:48,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 28 Unknown, 0 Unchecked, 0.68ms Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 81.75ms Time] [2021-11-12 22:26:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-12 22:26:48,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-12 22:26:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-11-12 22:26:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-12 22:26:48,107 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-12 22:26:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:48,108 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-12 22:26:48,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 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) [2021-11-12 22:26:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-12 22:26:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:26:48,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:48,109 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-12 22:26:48,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:48,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:26:48,341 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:48,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash -967943738, now seen corresponding path program 2 times [2021-11-12 22:26:48,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:48,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081928077] [2021-11-12 22:26:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:48,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:48,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:48,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081928077] [2021-11-12 22:26:48,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081928077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:48,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879017083] [2021-11-12 22:26:48,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:26:48,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:26:48,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:26:48,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:26:48,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 22:26:48,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:26:48,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:48,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:26:48,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:48,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:38:59,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879017083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:38:59,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871226282] [2021-11-12 22:38:59,790 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:38:59,791 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:38:59,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:38:59,791 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:38:59,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:38:59,803 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,804 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:38:59,805 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,806 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:38:59,806 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:38:59,807 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:38:59,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-12 22:38:59,817 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-12 22:38:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,834 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 [2021-11-12 22:38:59,834 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:38:59,840 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:38:59,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:38:59,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:59,877 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 [2021-11-12 22:38:59,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:38:59,882 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:38:59,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:38:59,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,890 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-12 22:38:59,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:38:59,893 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-12 22:38:59,898 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 132 [2021-11-12 22:38:59,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,957 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:38:59,958 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:38:59,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:38:59,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-12 22:38:59,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:38:59,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:39:00,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:39:00,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:39:00,017 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.6 percent of original size [2021-11-12 22:39:00,021 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:39:00,022 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:39:00,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:39:00,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-12 22:39:00,037 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:39:00,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:39:00,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:39:00,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2021-11-12 22:39:00,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849065638] [2021-11-12 22:39:00,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:39:00,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:39:00,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:39:00,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:39:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:39:00,560 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 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) [2021-11-12 22:39:59,522 WARN L227 SmtUtils]: Spent 51.10s on a formula simplification. DAG size of input: 161 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:40:37,497 WARN L227 SmtUtils]: Spent 28.74s on a formula simplification. DAG size of input: 163 DAG size of output: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:40:47,431 WARN L227 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 108 DAG size of output: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:41:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:00,509 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-11-12 22:41:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:41:00,510 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 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 8 [2021-11-12 22:41:00,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:00,511 INFO L225 Difference]: With dead ends: 21 [2021-11-12 22:41:00,511 INFO L226 Difference]: Without dead ends: 15 [2021-11-12 22:41:00,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 121.8s TimeCoverageRelationStatistics Valid=268, Invalid=849, Unknown=5, NotChecked=0, Total=1122 [2021-11-12 22:41:00,513 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2019.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2039.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:00,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 17 Invalid, 89 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [16 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 2039.01ms Time] [2021-11-12 22:41:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-12 22:41:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-12 22:41:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2021-11-12 22:41:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-12 22:41:00,519 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-12 22:41:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:00,519 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-12 22:41:00,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 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) [2021-11-12 22:41:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-12 22:41:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 22:41:00,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:00,520 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-12 22:41:00,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:00,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-12 22:41:00,742 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash -313388890, now seen corresponding path program 3 times [2021-11-12 22:41:00,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:41:00,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146526885] [2021-11-12 22:41:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:00,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:41:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:01,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:41:01,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146526885] [2021-11-12 22:41:01,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146526885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:01,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748282379] [2021-11-12 22:41:01,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:41:01,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:41:01,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:41:01,104 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:41:01,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eab028a-e020-4257-af94-0c78f082eacb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 22:41:01,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:41:01,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:41:01,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-12 22:41:01,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:01,688 INFO L328 TraceCheckSpWp]: Computing backward predicates...