./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw --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 63d04d5fbdccf2f819812182b810f1f191af60a43091410d38a30548a516f60e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 06:07:45,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 06:07:45,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 06:07:45,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 06:07:45,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 06:07:45,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 06:07:45,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 06:07:45,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 06:07:45,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 06:07:45,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 06:07:45,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 06:07:45,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 06:07:45,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 06:07:45,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 06:07:45,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 06:07:45,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 06:07:45,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 06:07:45,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 06:07:45,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 06:07:45,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 06:07:45,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 06:07:45,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 06:07:45,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 06:07:45,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 06:07:45,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 06:07:45,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 06:07:45,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 06:07:45,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 06:07:45,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 06:07:45,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 06:07:45,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 06:07:45,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 06:07:45,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 06:07:45,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 06:07:45,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 06:07:45,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 06:07:45,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 06:07:45,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 06:07:45,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 06:07:45,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 06:07:45,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 06:07:45,519 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 06:07:45,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 06:07:45,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 06:07:45,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 06:07:45,563 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 06:07:45,563 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 06:07:45,563 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 06:07:45,563 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 06:07:45,564 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 06:07:45,564 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 06:07:45,564 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 06:07:45,564 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 06:07:45,564 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 06:07:45,565 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 06:07:45,565 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 06:07:45,565 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 06:07:45,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 06:07:45,566 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 06:07:45,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 06:07:45,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 06:07:45,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 06:07:45,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 06:07:45,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 06:07:45,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 06:07:45,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 06:07:45,568 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 06:07:45,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 06:07:45,568 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 06:07:45,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 06:07:45,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 06:07:45,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 06:07:45,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:07:45,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 06:07:45,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 06:07:45,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 06:07:45,570 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 06:07:45,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 06:07:45,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 06:07:45,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 06:07:45,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 06:07:45,571 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_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63d04d5fbdccf2f819812182b810f1f191af60a43091410d38a30548a516f60e [2021-10-20 06:07:45,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 06:07:45,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 06:07:45,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 06:07:45,880 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 06:07:45,881 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 06:07:45,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/bitvector/gcd_4.c [2021-10-20 06:07:45,966 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/data/cdebde31a/3fae8960cee44efeb072d344c4498757/FLAGd004766c8 [2021-10-20 06:07:46,445 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 06:07:46,445 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/sv-benchmarks/c/bitvector/gcd_4.c [2021-10-20 06:07:46,451 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/data/cdebde31a/3fae8960cee44efeb072d344c4498757/FLAGd004766c8 [2021-10-20 06:07:46,813 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/data/cdebde31a/3fae8960cee44efeb072d344c4498757 [2021-10-20 06:07:46,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 06:07:46,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 06:07:46,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 06:07:46,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 06:07:46,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 06:07:46,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:07:46" (1/1) ... [2021-10-20 06:07:46,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700f6d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:46, skipping insertion in model container [2021-10-20 06:07:46,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:07:46" (1/1) ... [2021-10-20 06:07:46,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 06:07:46,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:07:47,065 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_61261fb1-877e-46bb-919e-565e969a9f3b/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-10-20 06:07:47,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:07:47,095 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 06:07:47,109 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_61261fb1-877e-46bb-919e-565e969a9f3b/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-10-20 06:07:47,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:07:47,131 INFO L208 MainTranslator]: Completed translation [2021-10-20 06:07:47,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47 WrapperNode [2021-10-20 06:07:47,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 06:07:47,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 06:07:47,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 06:07:47,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 06:07:47,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47" (1/1) ... [2021-10-20 06:07:47,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47" (1/1) ... [2021-10-20 06:07:47,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 06:07:47,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 06:07:47,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 06:07:47,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 06:07:47,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47" (1/1) ... [2021-10-20 06:07:47,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47" (1/1) ... [2021-10-20 06:07:47,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47" (1/1) ... [2021-10-20 06:07:47,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47" (1/1) ... [2021-10-20 06:07:47,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47" (1/1) ... [2021-10-20 06:07:47,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47" (1/1) ... [2021-10-20 06:07:47,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47" (1/1) ... [2021-10-20 06:07:47,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 06:07:47,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 06:07:47,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 06:07:47,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 06:07:47,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47" (1/1) ... [2021-10-20 06:07:47,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:07:47,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:07:47,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 06:07:47,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 06:07:47,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 06:07:47,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 06:07:47,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 06:07:47,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 06:07:47,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 06:07:47,700 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-20 06:07:47,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:07:47 BoogieIcfgContainer [2021-10-20 06:07:47,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 06:07:47,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 06:07:47,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 06:07:47,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 06:07:47,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:07:46" (1/3) ... [2021-10-20 06:07:47,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a559e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:07:47, skipping insertion in model container [2021-10-20 06:07:47,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:47" (2/3) ... [2021-10-20 06:07:47,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a559e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:07:47, skipping insertion in model container [2021-10-20 06:07:47,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:07:47" (3/3) ... [2021-10-20 06:07:47,730 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2021-10-20 06:07:47,736 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 06:07:47,746 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-20 06:07:47,823 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 06:07:47,834 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 [2021-10-20 06:07:47,835 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-20 06:07:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 16 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) [2021-10-20 06:07:47,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-20 06:07:47,864 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:07:47,864 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-20 06:07:47,865 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:07:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:07:47,881 INFO L82 PathProgramCache]: Analyzing trace with hash 109521743, now seen corresponding path program 1 times [2021-10-20 06:07:47,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:07:47,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728244829] [2021-10-20 06:07:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:47,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:07:48,020 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:07:48,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469869159] [2021-10-20 06:07:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:48,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:07:48,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:07:48,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-20 06:07:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:07:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-20 06:07:48,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:07:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:07:48,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:07:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:07:48,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:07:48,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728244829] [2021-10-20 06:07:48,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:48,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469869159] [2021-10-20 06:07:48,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469869159] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:07:48,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:07:48,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-20 06:07:48,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219302708] [2021-10-20 06:07:48,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:07:48,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:07:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:07:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:07:48,270 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 16 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) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-20 06:07:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:07:48,327 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-10-20 06:07:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:07:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 [2021-10-20 06:07:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:07:48,337 INFO L225 Difference]: With dead ends: 46 [2021-10-20 06:07:48,338 INFO L226 Difference]: Without dead ends: 28 [2021-10-20 06:07:48,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:07:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-20 06:07:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 15. [2021-10-20 06:07:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) 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) [2021-10-20 06:07:48,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-20 06:07:48,407 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2021-10-20 06:07:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:07:48,407 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-20 06:07:48,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-20 06:07:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-20 06:07:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-20 06:07:48,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:07:48,408 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-20 06:07:48,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-20 06:07:48,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:48,630 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:07:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:07:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash -896668108, now seen corresponding path program 1 times [2021-10-20 06:07:48,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:07:48,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931059229] [2021-10-20 06:07:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:48,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:07:48,650 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:07:48,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493383372] [2021-10-20 06:07:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:48,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:48,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:07:48,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:07:48,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-20 06:07:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:07:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-20 06:07:48,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:07:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:07:48,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:07:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:07:48,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:07:48,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931059229] [2021-10-20 06:07:48,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:48,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493383372] [2021-10-20 06:07:48,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493383372] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:07:48,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:07:48,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-20 06:07:48,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002643620] [2021-10-20 06:07:48,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:07:48,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:07:48,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:07:48,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:07:48,826 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2021-10-20 06:07:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:07:48,836 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-10-20 06:07:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:07:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) Word has length 6 [2021-10-20 06:07:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:07:48,838 INFO L225 Difference]: With dead ends: 28 [2021-10-20 06:07:48,838 INFO L226 Difference]: Without dead ends: 16 [2021-10-20 06:07:48,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:07:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-20 06:07:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-20 06:07:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 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) [2021-10-20 06:07:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-20 06:07:48,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 6 [2021-10-20 06:07:48,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:07:48,844 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-20 06:07:48,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2021-10-20 06:07:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-20 06:07:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-20 06:07:48,845 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:07:48,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:07:48,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-20 06:07:49,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:49,062 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:07:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:07:49,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2027476501, now seen corresponding path program 1 times [2021-10-20 06:07:49,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:07:49,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665897459] [2021-10-20 06:07:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:49,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:07:49,083 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:07:49,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503365704] [2021-10-20 06:07:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:49,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:49,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:07:49,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:07:49,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-20 06:07:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:07:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-20 06:07:49,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:07:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:07:49,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:07:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:07:49,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:07:49,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665897459] [2021-10-20 06:07:49,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:49,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503365704] [2021-10-20 06:07:49,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503365704] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:07:49,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763614254] [2021-10-20 06:07:49,417 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-20 06:07:49,418 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:07:49,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:07:49,431 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:07:49,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:07:49,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,490 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:49,491 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-20 06:07:49,499 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:49,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,501 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-20 06:07:49,512 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-20 06:07:49,544 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 21=[|v_#valid_18|]} [2021-10-20 06:07:49,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:07:49,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:49,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:49,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:49,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,616 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 [2021-10-20 06:07:49,617 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:07:49,618 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:07:49,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:49,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:07:49,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:49,639 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:49,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:49,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:07:49,655 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,655 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:49,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:49,657 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:49,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:49,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:49,795 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 [2021-10-20 06:07:49,797 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:07:49,803 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:07:49,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:49,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:49,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,875 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-10-20 06:07:49,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:07:49,880 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:569, output treesize:117 [2021-10-20 06:07:49,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:49,911 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-20 06:07:49,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:49,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:49,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:49,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:49,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,048 INFO L180 QuantifierPusher]: treesize reduction 50, result has 62.1 percent of original size [2021-10-20 06:07:50,063 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:50,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:50,077 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-20 06:07:50,090 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-20 06:07:50,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,173 INFO L180 QuantifierPusher]: treesize reduction 46, result has 63.5 percent of original size [2021-10-20 06:07:50,177 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:50,181 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:50,187 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-20 06:07:50,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-20 06:07:50,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:50,279 INFO L180 QuantifierPusher]: treesize reduction 46, result has 62.6 percent of original size [2021-10-20 06:07:50,281 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:50,282 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:50,286 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-20 06:07:50,290 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-10-20 06:07:50,301 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:07:51,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:51,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-20 06:07:51,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-20 06:07:51,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688834980] [2021-10-20 06:07:51,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 06:07:51,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:07:51,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 06:07:51,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-20 06:07:51,028 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-10-20 06:07:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:07:51,067 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-10-20 06:07:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 06:07:51,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 [2021-10-20 06:07:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:07:51,072 INFO L225 Difference]: With dead ends: 30 [2021-10-20 06:07:51,072 INFO L226 Difference]: Without dead ends: 18 [2021-10-20 06:07:51,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 764.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-20 06:07:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-20 06:07:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-20 06:07:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.2) internal successors, (18), 17 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) [2021-10-20 06:07:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-10-20 06:07:51,077 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 7 [2021-10-20 06:07:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:07:51,078 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-10-20 06:07:51,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-10-20 06:07:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-10-20 06:07:51,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 06:07:51,079 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:07:51,080 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-10-20 06:07:51,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-20 06:07:51,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:51,281 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:07:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:07:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1492029195, now seen corresponding path program 2 times [2021-10-20 06:07:51,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:07:51,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977763410] [2021-10-20 06:07:51,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:51,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:07:51,303 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:07:51,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98529531] [2021-10-20 06:07:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-20 06:07:51,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:51,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:07:51,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:07:51,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-20 06:07:51,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-20 06:07:51,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-20 06:07:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-20 06:07:51,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:07:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:07:51,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:07:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:07:51,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:07:51,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977763410] [2021-10-20 06:07:51,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:51,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98529531] [2021-10-20 06:07:51,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98529531] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:07:51,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [315703844] [2021-10-20 06:07:51,710 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-20 06:07:51,710 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:07:51,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:07:51,711 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:07:51,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:07:51,717 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,718 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:51,719 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,719 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-20 06:07:51,720 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:51,721 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,721 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-20 06:07:51,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-20 06:07:51,731 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 21=[|v_#valid_19|]} [2021-10-20 06:07:51,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:07:51,740 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:51,741 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:51,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:51,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:07:51,750 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,751 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:51,751 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:51,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:51,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:07:51,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:51,761 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:51,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:51,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,775 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 [2021-10-20 06:07:51,776 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,776 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:07:51,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:07:51,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:51,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:51,808 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 [2021-10-20 06:07:51,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:07:51,812 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:07:51,813 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:51,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,824 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-10-20 06:07:51,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:07:51,825 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:569, output treesize:117 [2021-10-20 06:07:51,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,836 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-20 06:07:51,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,886 INFO L180 QuantifierPusher]: treesize reduction 50, result has 62.1 percent of original size [2021-10-20 06:07:51,889 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:51,890 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-10-20 06:07:51,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-20 06:07:51,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,954 INFO L180 QuantifierPusher]: treesize reduction 46, result has 63.5 percent of original size [2021-10-20 06:07:51,957 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:51,958 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:51,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-10-20 06:07:51,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-20 06:07:51,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:51,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:52,006 INFO L180 QuantifierPusher]: treesize reduction 46, result has 62.6 percent of original size [2021-10-20 06:07:52,008 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:52,009 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:52,016 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-20 06:07:52,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-10-20 06:07:52,031 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:07:52,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:52,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-20 06:07:52,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-20 06:07:52,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053866533] [2021-10-20 06:07:52,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 06:07:52,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:07:52,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 06:07:52,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-10-20 06:07:52,738 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 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) [2021-10-20 06:07:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:07:52,820 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-10-20 06:07:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-20 06:07:52,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 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) Word has length 9 [2021-10-20 06:07:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:07:52,821 INFO L225 Difference]: With dead ends: 31 [2021-10-20 06:07:52,821 INFO L226 Difference]: Without dead ends: 19 [2021-10-20 06:07:52,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 843.8ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-10-20 06:07:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-20 06:07:52,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-20 06:07:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 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) [2021-10-20 06:07:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-10-20 06:07:52,826 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 9 [2021-10-20 06:07:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:07:52,826 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-10-20 06:07:52,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 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) [2021-10-20 06:07:52,827 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-10-20 06:07:52,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-20 06:07:52,828 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:07:52,828 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-20 06:07:52,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-20 06:07:53,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:53,062 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:07:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:07:53,062 INFO L82 PathProgramCache]: Analyzing trace with hash -992304140, now seen corresponding path program 3 times [2021-10-20 06:07:53,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:07:53,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378833819] [2021-10-20 06:07:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:53,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:07:53,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:07:53,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145252232] [2021-10-20 06:07:53,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-20 06:07:53,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:53,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:07:53,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:07:53,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-20 06:07:53,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-20 06:07:53,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-20 06:07:53,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-20 06:07:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:07:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:07:53,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:07:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:07:53,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:07:53,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378833819] [2021-10-20 06:07:53,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:53,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145252232] [2021-10-20 06:07:53,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145252232] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:07:53,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711168077] [2021-10-20 06:07:53,645 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-20 06:07:53,645 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:07:53,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:07:53,645 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:07:53,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:07:53,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,659 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:53,659 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,660 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-20 06:07:53,660 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:53,661 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-20 06:07:53,664 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-20 06:07:53,671 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_19|], 21=[|v_#valid_20|]} [2021-10-20 06:07:53,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,695 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 [2021-10-20 06:07:53,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:07:53,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,700 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:07:53,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:53,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:07:53,707 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:53,708 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:53,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:53,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:07:53,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,716 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:53,717 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,717 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:53,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:53,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:07:53,724 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:53,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:07:53,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:53,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:07:53,764 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 [2021-10-20 06:07:53,765 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,767 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:07:53,767 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,768 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:07:53,768 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-10-20 06:07:53,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,776 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,777 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-10-20 06:07:53,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:07:53,781 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:569, output treesize:117 [2021-10-20 06:07:53,787 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-20 06:07:53,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,835 INFO L180 QuantifierPusher]: treesize reduction 50, result has 62.1 percent of original size [2021-10-20 06:07:53,837 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:53,837 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-20 06:07:53,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-20 06:07:53,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,884 INFO L180 QuantifierPusher]: treesize reduction 46, result has 63.5 percent of original size [2021-10-20 06:07:53,887 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:53,888 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-20 06:07:53,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-20 06:07:53,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:53,947 INFO L180 QuantifierPusher]: treesize reduction 46, result has 62.6 percent of original size [2021-10-20 06:07:53,949 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:07:53,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:07:53,952 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-20 06:07:53,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-10-20 06:07:53,968 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:07:54,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:54,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-20 06:07:54,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-20 06:07:54,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398416289] [2021-10-20 06:07:54,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-20 06:07:54,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:07:54,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-20 06:07:54,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-20 06:07:54,708 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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) [2021-10-20 06:07:55,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:07:55,072 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-10-20 06:07:55,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-20 06:07:55,073 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 [2021-10-20 06:07:55,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:07:55,073 INFO L225 Difference]: With dead ends: 36 [2021-10-20 06:07:55,074 INFO L226 Difference]: Without dead ends: 24 [2021-10-20 06:07:55,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1165.9ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-10-20 06:07:55,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-20 06:07:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-20 06:07:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-10-20 06:07:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-20 06:07:55,081 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 10 [2021-10-20 06:07:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:07:55,081 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-20 06:07:55,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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) [2021-10-20 06:07:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-20 06:07:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-20 06:07:55,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:07:55,082 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2021-10-20 06:07:55,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-20 06:07:55,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-20 06:07:55,307 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:07:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:07:55,308 INFO L82 PathProgramCache]: Analyzing trace with hash -697226197, now seen corresponding path program 4 times [2021-10-20 06:07:55,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:07:55,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516889345] [2021-10-20 06:07:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:55,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:07:55,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:07:55,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317349748] [2021-10-20 06:07:55,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-20 06:07:55,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:55,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:07:55,334 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:07:55,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-20 06:07:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:07:55,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-20 06:07:55,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:07:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:07:55,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:08:12,385 WARN L207 SmtUtils]: Spent 12.20 s on a formula simplification that was a NOOP. DAG size: 47 [2021-10-20 06:08:59,502 WARN L207 SmtUtils]: Spent 33.56 s on a formula simplification that was a NOOP. DAG size: 83 [2021-10-20 06:11:12,637 WARN L207 SmtUtils]: Spent 1.78 m on a formula simplification that was a NOOP. DAG size: 146 [2021-10-20 06:11:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:11:34,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:11:34,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516889345] [2021-10-20 06:11:34,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:11:34,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317349748] [2021-10-20 06:11:34,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317349748] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:11:34,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1444464915] [2021-10-20 06:11:34,171 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-20 06:11:34,171 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:11:34,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:11:34,171 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:11:34,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:11:34,179 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,180 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:11:34,181 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-20 06:11:34,182 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:11:34,182 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-20 06:11:34,184 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-20 06:11:34,189 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_20|], 21=[|v_#valid_21|]} [2021-10-20 06:11:34,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:11:34,198 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:11:34,199 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:11:34,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:11:34,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,219 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 [2021-10-20 06:11:34,220 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:11:34,221 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,222 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:11:34,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:11:34,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:11:34,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:11:34,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,231 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:11:34,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-20 06:11:34,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:11:34,255 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:11:34,256 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:11:34,257 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-20 06:11:34,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:11:34,285 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 [2021-10-20 06:11:34,286 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,288 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:11:34,289 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:11:34,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-10-20 06:11:34,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,300 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-10-20 06:11:34,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:11:34,302 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:569, output treesize:117 [2021-10-20 06:11:34,308 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,313 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-20 06:11:34,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,352 INFO L180 QuantifierPusher]: treesize reduction 50, result has 62.1 percent of original size [2021-10-20 06:11:34,360 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:11:34,360 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-10-20 06:11:34,367 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-20 06:11:34,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,395 INFO L180 QuantifierPusher]: treesize reduction 46, result has 63.5 percent of original size [2021-10-20 06:11:34,399 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:11:34,400 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-10-20 06:11:34,405 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-20 06:11:34,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:11:34,433 INFO L180 QuantifierPusher]: treesize reduction 46, result has 62.6 percent of original size [2021-10-20 06:11:34,434 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:11:34,434 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:11:34,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-20 06:11:34,438 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-10-20 06:11:34,448 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:11:36,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:11:36,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-20 06:11:36,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-20 06:11:36,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983283275] [2021-10-20 06:11:36,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-20 06:11:36,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:11:36,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-20 06:11:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=354, Unknown=1, NotChecked=0, Total=462 [2021-10-20 06:11:36,156 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 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) [2021-10-20 06:11:36,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:11:36,395 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-20 06:11:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 06:11:36,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 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 [2021-10-20 06:11:36,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:11:36,396 INFO L225 Difference]: With dead ends: 34 [2021-10-20 06:11:36,396 INFO L226 Difference]: Without dead ends: 18 [2021-10-20 06:11:36,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 164367.9ms TimeCoverageRelationStatistics Valid=131, Invalid=420, Unknown=1, NotChecked=0, Total=552 [2021-10-20 06:11:36,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-20 06:11:36,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-20 06:11:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 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) [2021-10-20 06:11:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2021-10-20 06:11:36,401 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 11 [2021-10-20 06:11:36,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:11:36,402 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2021-10-20 06:11:36,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 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) [2021-10-20 06:11:36,402 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2021-10-20 06:11:36,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-20 06:11:36,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:11:36,403 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:11:36,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-20 06:11:36,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-10-20 06:11:36,620 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:11:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:11:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash -19320690, now seen corresponding path program 1 times [2021-10-20 06:11:36,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:11:36,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927992377] [2021-10-20 06:11:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:11:36,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:11:36,637 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:11:36,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813031423] [2021-10-20 06:11:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:11:36,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:11:36,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:11:36,648 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:11:36,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-20 06:11:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:11:36,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-20 06:11:36,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:11:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:11:37,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:11:50,395 WARN L207 SmtUtils]: Spent 12.11 s on a formula simplification that was a NOOP. DAG size: 44 [2021-10-20 06:12:17,406 WARN L207 SmtUtils]: Spent 23.23 s on a formula simplification that was a NOOP. DAG size: 82 [2021-10-20 06:14:28,350 WARN L207 SmtUtils]: Spent 1.73 m on a formula simplification that was a NOOP. DAG size: 144 [2021-10-20 06:14:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:14:53,179 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:14:53,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927992377] [2021-10-20 06:14:53,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:14:53,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813031423] [2021-10-20 06:14:53,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813031423] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:14:53,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1959131074] [2021-10-20 06:14:53,181 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-20 06:14:53,181 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:14:53,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:14:53,182 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:14:53,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:14:53,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,189 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:14:53,189 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-20 06:14:53,200 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:14:53,200 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,201 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-20 06:14:53,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-20 06:14:53,209 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_21|], 21=[|v_#valid_22|]} [2021-10-20 06:14:53,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:14:53,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:14:53,215 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:14:53,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:14:53,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,231 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 [2021-10-20 06:14:53,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,232 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:14:53,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:14:53,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:14:53,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:14:53,239 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:14:53,240 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:14:53,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-20 06:14:53,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-20 06:14:53,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:14:53,254 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-20 06:14:53,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-20 06:14:53,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:14:53,286 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 [2021-10-20 06:14:53,287 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,290 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:14:53,290 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:14:53,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-10-20 06:14:53,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,300 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-10-20 06:14:53,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:14:53,300 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:569, output treesize:117 [2021-10-20 06:14:53,306 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-20 06:14:53,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,343 INFO L180 QuantifierPusher]: treesize reduction 50, result has 62.1 percent of original size [2021-10-20 06:14:53,344 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:14:53,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,347 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-20 06:14:53,350 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-20 06:14:53,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,375 INFO L180 QuantifierPusher]: treesize reduction 46, result has 63.5 percent of original size [2021-10-20 06:14:53,376 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:14:53,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,379 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-20 06:14:53,382 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-20 06:14:53,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:53,406 INFO L180 QuantifierPusher]: treesize reduction 46, result has 62.6 percent of original size [2021-10-20 06:14:53,407 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:14:53,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:14:53,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-20 06:14:53,417 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-10-20 06:14:53,438 INFO L180 QuantifierPusher]: treesize reduction 74, result has 93.0 percent of original size [2021-10-20 06:14:53,490 INFO L185 QuantifierPusher]: treesize reduction 167, result has 73.7 percent of original size 467 [2021-10-20 06:14:53,510 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:14:56,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:14:56,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-20 06:14:56,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-20 06:14:56,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877914365] [2021-10-20 06:14:56,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-20 06:14:56,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:14:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-20 06:14:56,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=516, Unknown=2, NotChecked=0, Total=650 [2021-10-20 06:14:56,378 INFO L87 Difference]: Start difference. First operand 18 states and 17 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 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) [2021-10-20 06:14:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:14:56,558 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2021-10-20 06:14:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-20 06:14:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 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 13 [2021-10-20 06:14:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:14:56,559 INFO L225 Difference]: With dead ends: 18 [2021-10-20 06:14:56,559 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 06:14:56,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 150047.1ms TimeCoverageRelationStatistics Valid=173, Invalid=637, Unknown=2, NotChecked=0, Total=812 [2021-10-20 06:14:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 06:14:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 06:14:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-20 06:14:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 06:14:56,560 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-10-20 06:14:56,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:14:56,560 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 06:14:56,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 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) [2021-10-20 06:14:56,561 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 06:14:56,561 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 06:14:56,563 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:14:56,563 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:14:56,563 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:14:56,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-20 06:14:56,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-10-20 06:14:56,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-20 06:14:56,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:56,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:56,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:56,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:56,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:14:57,173 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-10-20 06:14:57,173 INFO L857 garLoopResultBuilder]: For program point L15-1(lines 13 29) no Hoare annotation was computed. [2021-10-20 06:14:57,174 INFO L857 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-10-20 06:14:57,174 INFO L853 garLoopResultBuilder]: At program point L7-2(lines 6 11) the Hoare annotation is: (let ((.cse0 (* 3 ULTIMATE.start_main_~y~0))) (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (+ ULTIMATE.start_gcd_test_~b (* 2 ULTIMATE.start_main_~x~0)) 126) (= (+ ULTIMATE.start_main_~g~0 .cse0) 63) (= (+ ULTIMATE.start_gcd_test_~b 126) (* 7 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~y~0 18) (= (+ |ULTIMATE.start_gcd_test_#res| .cse0) 63) (= (+ ULTIMATE.start_gcd_test_~a .cse0) 63))) [2021-10-20 06:14:57,174 INFO L857 garLoopResultBuilder]: For program point L7-3(lines 7 9) no Hoare annotation was computed. [2021-10-20 06:14:57,174 INFO L853 garLoopResultBuilder]: At program point L7-5(lines 6 11) the Hoare annotation is: (let ((.cse0 (* 3 ULTIMATE.start_main_~y~0))) (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (+ ULTIMATE.start_gcd_test_~b (* 2 ULTIMATE.start_main_~x~0)) 126) (= (+ ULTIMATE.start_main_~g~0 .cse0) 63) (= (+ ULTIMATE.start_gcd_test_~b 126) (* 7 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~y~0 18) (= (+ |ULTIMATE.start_gcd_test_#res| .cse0) 63) (= (+ ULTIMATE.start_gcd_test_~a .cse0) 63))) [2021-10-20 06:14:57,174 INFO L857 garLoopResultBuilder]: For program point L7-6(lines 7 9) no Hoare annotation was computed. [2021-10-20 06:14:57,175 INFO L853 garLoopResultBuilder]: At program point L7-8(lines 6 11) the Hoare annotation is: (< 0 ULTIMATE.start_gcd_test_~a) [2021-10-20 06:14:57,175 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-20 06:14:57,175 INFO L853 garLoopResultBuilder]: At program point L28(lines 12 29) the Hoare annotation is: (let ((.cse0 (* 3 ULTIMATE.start_main_~y~0))) (and (= (+ ULTIMATE.start_gcd_test_~b (* 2 ULTIMATE.start_main_~x~0)) 126) (= (+ ULTIMATE.start_gcd_test_~b 126) (* 7 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~y~0 18) (= (+ |ULTIMATE.start_gcd_test_#res| .cse0) 63) (= (+ ULTIMATE.start_gcd_test_~a .cse0) 63))) [2021-10-20 06:14:57,175 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-10-20 06:14:57,175 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-10-20 06:14:57,175 INFO L857 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-10-20 06:14:57,175 INFO L857 garLoopResultBuilder]: For program point L8-2(line 8) no Hoare annotation was computed. [2021-10-20 06:14:57,176 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-20 06:14:57,176 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-10-20 06:14:57,176 INFO L853 garLoopResultBuilder]: At program point L22-2(lines 21 27) the Hoare annotation is: (let ((.cse2 (= ULTIMATE.start_main_~x~0 63)) (.cse0 (= ULTIMATE.start_gcd_test_~b 18)) (.cse1 (= ULTIMATE.start_main_~y~0 18)) (.cse3 (= (+ ULTIMATE.start_gcd_test_~a (* 3 ULTIMATE.start_main_~y~0)) 63))) (or (and (= (+ ULTIMATE.start_gcd_test_~a (* 2 ULTIMATE.start_main_~y~0)) 63) .cse0 .cse1 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_gcd_test_~a 36))) (and .cse2 .cse0 .cse3 (= ULTIMATE.start_gcd_test_~a 9)) (and (= (+ ULTIMATE.start_gcd_test_~b (* 2 ULTIMATE.start_main_~x~0)) 126) (= (+ ULTIMATE.start_gcd_test_~b 126) (* 7 ULTIMATE.start_main_~y~0)) .cse1 .cse3) (and .cse2 .cse0 .cse1 (= ULTIMATE.start_gcd_test_~a ULTIMATE.start_main_~x~0)) (and .cse0 (= (+ ULTIMATE.start_gcd_test_~a ULTIMATE.start_main_~y~0) 63) .cse1 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_gcd_test_~a 18))) (and (= (+ ULTIMATE.start_gcd_test_~b ULTIMATE.start_main_~x~0) 72) .cse1 (= ULTIMATE.start_gcd_test_~b 9) .cse3))) [2021-10-20 06:14:57,180 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 06:14:57,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:14:57 BoogieIcfgContainer [2021-10-20 06:14:57,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 06:14:57,215 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 06:14:57,215 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 06:14:57,215 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 06:14:57,216 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:07:47" (3/4) ... [2021-10-20 06:14:57,219 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 06:14:57,228 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-20 06:14:57,228 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-20 06:14:57,228 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-20 06:14:57,229 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 06:14:57,249 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((b + 2 * x == 126 && b + 126 == 7 * y) && y == 18) && \result + 3 * y == 63) && a + 3 * y == 63 [2021-10-20 06:14:57,250 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((1 <= cond && b + 2 * x == 126) && g + 3 * y == 63) && b + 126 == 7 * y) && y == 18) && \result + 3 * y == 63) && a + 3 * y == 63 [2021-10-20 06:14:57,250 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((1 <= cond && b + 2 * x == 126) && g + 3 * y == 63) && b + 126 == 7 * y) && y == 18) && \result + 3 * y == 63) && a + 3 * y == 63 [2021-10-20 06:14:57,274 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 06:14:57,274 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 06:14:57,275 INFO L168 Benchmark]: Toolchain (without parser) took 430450.40 ms. Allocated memory was 96.5 MB in the beginning and 151.0 MB in the end (delta: 54.5 MB). Free memory was 61.3 MB in the beginning and 55.2 MB in the end (delta: 6.0 MB). Peak memory consumption was 60.6 MB. Max. memory is 16.1 GB. [2021-10-20 06:14:57,275 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 96.5 MB. Free memory was 66.9 MB in the beginning and 66.8 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:14:57,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.98 ms. Allocated memory was 96.5 MB in the beginning and 125.8 MB in the end (delta: 29.4 MB). Free memory was 61.0 MB in the beginning and 101.7 MB in the end (delta: -40.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 06:14:57,276 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.82 ms. Allocated memory is still 125.8 MB. Free memory was 101.7 MB in the beginning and 100.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:14:57,276 INFO L168 Benchmark]: Boogie Preprocessor took 27.14 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 98.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:14:57,276 INFO L168 Benchmark]: RCFGBuilder took 517.52 ms. Allocated memory is still 125.8 MB. Free memory was 98.9 MB in the beginning and 84.9 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-20 06:14:57,276 INFO L168 Benchmark]: TraceAbstraction took 429477.98 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 84.9 MB in the beginning and 58.4 MB in the end (delta: 26.5 MB). Peak memory consumption was 53.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:14:57,277 INFO L168 Benchmark]: Witness Printer took 58.87 ms. Allocated memory is still 151.0 MB. Free memory was 58.4 MB in the beginning and 55.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:14:57,278 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 96.5 MB. Free memory was 66.9 MB in the beginning and 66.8 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.98 ms. Allocated memory was 96.5 MB in the beginning and 125.8 MB in the end (delta: 29.4 MB). Free memory was 61.0 MB in the beginning and 101.7 MB in the end (delta: -40.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.82 ms. Allocated memory is still 125.8 MB. Free memory was 101.7 MB in the beginning and 100.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.14 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 98.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 517.52 ms. Allocated memory is still 125.8 MB. Free memory was 98.9 MB in the beginning and 84.9 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 429477.98 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 84.9 MB in the beginning and 58.4 MB in the end (delta: 26.5 MB). Peak memory consumption was 53.1 MB. Max. memory is 16.1 GB. * Witness Printer took 58.87 ms. Allocated memory is still 151.0 MB. Free memory was 58.4 MB in the beginning and 55.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 429359.5ms, OverallIterations: 7, TraceHistogramMax: 5, EmptinessCheckTime: 15.4ms, AutomataDifference: 1022.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 390.8ms, InitialAbstractionConstructionTime: 16.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 76 SDtfs, 200 SDslu, 200 SDs, 0 SdLazy, 262 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 369.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 317205.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 58.9ms AutomataMinimizationTime, 7 MinimizatonAttempts, 13 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 16 NumberOfFragments, 230 HoareAnnotationTreeSize, 5 FomulaSimplifications, 94 FormulaSimplificationTreeSizeReduction, 67.2ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 861 FormulaSimplificationTreeSizeReductionInter, 317.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 43.4ms SsaConstructionTime, 141.4ms SatisfiabilityAnalysisTime, 416361.5ms InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 2751 SizeOfPredicates, 37 NumberOfNonLiveVariables, 439 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 0/94 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: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: (((((1 <= cond && b + 2 * x == 126) && g + 3 * y == 63) && b + 126 == 7 * y) && y == 18) && \result + 3 * y == 63) && a + 3 * y == 63 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: (((((1 <= cond && b + 2 * x == 126) && g + 3 * y == 63) && b + 126 == 7 * y) && y == 18) && \result + 3 * y == 63) && a + 3 * y == 63 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: (((b + 2 * x == 126 && b + 126 == 7 * y) && y == 18) && \result + 3 * y == 63) && a + 3 * y == 63 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 0 < a - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((((((a + 2 * y == 63 && b == 18) && y == 18) && x == a + 36) || (((x == 63 && b == 18) && a + 3 * y == 63) && a == 9)) || (((b + 2 * x == 126 && b + 126 == 7 * y) && y == 18) && a + 3 * y == 63)) || (((x == 63 && b == 18) && y == 18) && a == x)) || (((b == 18 && a + y == 63) && y == 18) && x == a + 18)) || (((b + x == 72 && y == 18) && b == 9) && a + 3 * y == 63) RESULT: Ultimate proved your program to be correct! [2021-10-20 06:14:57,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61261fb1-877e-46bb-919e-565e969a9f3b/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...