./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1972ee33272415a52c6f0d8a1f799e9d488ad771872c0cf36a214b07ea597fd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:35:09,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:35:09,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:35:09,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:35:09,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:35:09,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:35:09,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:35:09,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:35:09,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:35:09,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:35:09,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:35:09,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:35:09,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:35:09,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:35:09,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:35:09,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:35:09,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:35:09,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:35:09,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:35:09,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:35:09,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:35:09,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:35:09,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:35:09,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:35:09,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:35:09,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:35:09,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:35:09,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:35:09,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:35:09,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:35:09,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:35:09,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:35:09,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:35:09,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:35:09,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:35:09,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:35:09,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:35:09,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:35:09,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:35:09,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:35:09,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:35:09,486 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:35:09,535 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:35:09,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:35:09,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:35:09,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:35:09,538 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:35:09,538 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:35:09,538 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:35:09,538 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:35:09,539 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:35:09,539 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:35:09,540 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:35:09,541 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:35:09,541 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:35:09,541 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:35:09,541 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:35:09,542 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:35:09,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:35:09,543 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:35:09,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:35:09,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:35:09,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:35:09,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:35:09,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:35:09,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:35:09,545 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:35:09,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:35:09,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:35:09,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:35:09,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:35:09,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:35:09,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:35:09,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:09,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:35:09,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:35:09,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:35:09,550 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:35:09,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:35:09,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:35:09,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:35:09,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:35:09,551 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_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1972ee33272415a52c6f0d8a1f799e9d488ad771872c0cf36a214b07ea597fd [2021-11-12 22:35:09,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:35:09,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:35:09,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:35:09,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:35:09,896 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:35:09,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2021-11-12 22:35:09,970 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/data/b8dc81b0a/17c2b71155004a8aac22bbed977d75ee/FLAGcebb4aa8f [2021-11-12 22:35:10,510 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:35:10,512 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2021-11-12 22:35:10,523 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/data/b8dc81b0a/17c2b71155004a8aac22bbed977d75ee/FLAGcebb4aa8f [2021-11-12 22:35:10,881 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/data/b8dc81b0a/17c2b71155004a8aac22bbed977d75ee [2021-11-12 22:35:10,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:35:10,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:35:10,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:10,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:35:10,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:35:10,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:10" (1/1) ... [2021-11-12 22:35:10,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102648ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:10, skipping insertion in model container [2021-11-12 22:35:10,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:10" (1/1) ... [2021-11-12 22:35:10,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:35:10,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:35:11,099 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_50b81b19-3aa2-4d86-b699-dbe3e9662868/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2021-11-12 22:35:11,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:11,127 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:35:11,136 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_50b81b19-3aa2-4d86-b699-dbe3e9662868/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2021-11-12 22:35:11,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:11,153 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:35:11,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11 WrapperNode [2021-11-12 22:35:11,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:11,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:11,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:35:11,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:35:11,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11" (1/1) ... [2021-11-12 22:35:11,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11" (1/1) ... [2021-11-12 22:35:11,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:11,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:35:11,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:35:11,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:35:11,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11" (1/1) ... [2021-11-12 22:35:11,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11" (1/1) ... [2021-11-12 22:35:11,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11" (1/1) ... [2021-11-12 22:35:11,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11" (1/1) ... [2021-11-12 22:35:11,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11" (1/1) ... [2021-11-12 22:35:11,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11" (1/1) ... [2021-11-12 22:35:11,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11" (1/1) ... [2021-11-12 22:35:11,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:35:11,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:35:11,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:35:11,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:35:11,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11" (1/1) ... [2021-11-12 22:35:11,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:11,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:11,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:35:11,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:35:11,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:35:11,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:35:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:35:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:35:11,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:35:11,589 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:35:11,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:11 BoogieIcfgContainer [2021-11-12 22:35:11,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:35:11,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:35:11,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:35:11,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:35:11,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:35:10" (1/3) ... [2021-11-12 22:35:11,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9080412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:11, skipping insertion in model container [2021-11-12 22:35:11,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:11" (2/3) ... [2021-11-12 22:35:11,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9080412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:11, skipping insertion in model container [2021-11-12 22:35:11,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:11" (3/3) ... [2021-11-12 22:35:11,601 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2021-11-12 22:35:11,607 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:35:11,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:35:11,659 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:35:11,667 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:35:11,668 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:35:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:35:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 22:35:11,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:11,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 22:35:11,689 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2065030, now seen corresponding path program 1 times [2021-11-12 22:35:11,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:11,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828181245] [2021-11-12 22:35:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:11,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:12,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:12,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828181245] [2021-11-12 22:35:12,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828181245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:12,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:12,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:35:12,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274878993] [2021-11-12 22:35:12,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:12,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:35:12,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:35:12,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:35:12,178 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:35:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:12,225 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-12 22:35:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:35:12,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-12 22:35:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:12,239 INFO L225 Difference]: With dead ends: 13 [2021-11-12 22:35:12,240 INFO L226 Difference]: Without dead ends: 6 [2021-11-12 22:35:12,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:35:12,251 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.62ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:12,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.62ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 26.37ms Time] [2021-11-12 22:35:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-12 22:35:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-12 22:35:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:35:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-12 22:35:12,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-12 22:35:12,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:12,286 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-12 22:35:12,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:35:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-12 22:35:12,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 22:35:12,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:12,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 22:35:12,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:35:12,289 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:12,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:12,293 INFO L85 PathProgramCache]: Analyzing trace with hash 64119683, now seen corresponding path program 1 times [2021-11-12 22:35:12,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:12,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146836925] [2021-11-12 22:35:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:12,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:12,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:12,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146836925] [2021-11-12 22:35:12,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146836925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:35:12,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746200199] [2021-11-12 22:35:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:12,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:12,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:12,504 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:12,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:35:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:35:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:12,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:12,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746200199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:12,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [719023530] [2021-11-12 22:35:12,893 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:35:12,894 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:35:12,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:35:12,904 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:35:12,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:35:12,942 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:12,948 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:12,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:12,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:35:12,954 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:12,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:12,957 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:35:12,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-12 22:35:12,990 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-12 22:35:13,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 22:35:13,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:13,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:13,019 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:13,020 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:13,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:13,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:13,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:13,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:13,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 22:35:13,098 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:13,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:35:13,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:13,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:35:13,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:13,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:13,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:13,140 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:13,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-12 22:35:13,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:35:13,144 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-12 22:35:13,159 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:13,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-12 22:35:13,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:13,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:13,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:13,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:13,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:13,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:13,255 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.6 percent of original size [2021-11-12 22:35:13,268 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:13,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:13,275 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:35:13,284 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-12 22:35:13,295 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:35:13,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:35:13,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:35:13,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-12 22:35:13,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100431343] [2021-11-12 22:35:13,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:35:13,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:35:13,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:35:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:35:13,645 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:35:13,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:13,702 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-12 22:35:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:35:13,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-12 22:35:13,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:13,703 INFO L225 Difference]: With dead ends: 12 [2021-11-12 22:35:13,703 INFO L226 Difference]: Without dead ends: 9 [2021-11-12 22:35:13,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:35:13,706 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.54ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:13,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.54ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 21.88ms Time] [2021-11-12 22:35:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-12 22:35:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-12 22:35:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:35:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-12 22:35:13,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-12 22:35:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:13,710 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-12 22:35:13,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:35:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-12 22:35:13,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:35:13,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:13,712 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-12 22:35:13,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:13,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:13,928 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:13,929 INFO L85 PathProgramCache]: Analyzing trace with hash -967943738, now seen corresponding path program 2 times [2021-11-12 22:35:13,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:13,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096779310] [2021-11-12 22:35:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:13,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:14,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:14,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096779310] [2021-11-12 22:35:14,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096779310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:35:14,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740929159] [2021-11-12 22:35:14,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:35:14,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:14,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:14,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:14,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 22:35:14,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:35:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:35:14,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:35:14,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:14,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:14,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740929159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:14,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121245243] [2021-11-12 22:35:14,499 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:35:14,499 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:35:14,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:35:14,500 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:35:14,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:35:14,515 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,516 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:14,518 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:35:14,519 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:14,520 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:35:14,528 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-12 22:35:14,533 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-12 22:35:14,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 22:35:14,557 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:14,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,559 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:14,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:14,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:14,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:14,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 22:35:14,587 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:35:14,590 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:35:14,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:14,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:14,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-12 22:35:14,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:35:14,600 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-12 22:35:14,604 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,609 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-12 22:35:14,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:14,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:14,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:14,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:14,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:14,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:14,649 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.6 percent of original size [2021-11-12 22:35:14,661 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:14,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:14,668 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:35:14,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-12 22:35:14,680 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:35:15,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:35:15,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:35:15,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-11-12 22:35:15,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180726096] [2021-11-12 22:35:15,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:35:15,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:35:15,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:35:15,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:35:15,113 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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) [2021-11-12 22:35:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:15,739 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-12 22:35:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:35:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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) Word has length 8 [2021-11-12 22:35:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:15,740 INFO L225 Difference]: With dead ends: 18 [2021-11-12 22:35:15,740 INFO L226 Difference]: Without dead ends: 15 [2021-11-12 22:35:15,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:35:15,742 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.04ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:15,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 51 Unknown, 0 Unchecked, 1.04ms Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 153.50ms Time] [2021-11-12 22:35:15,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-12 22:35:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-12 22:35:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:35:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-12 22:35:15,748 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-12 22:35:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:15,748 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-12 22:35:15,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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) [2021-11-12 22:35:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-12 22:35:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 22:35:15,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:15,749 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-12 22:35:15,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:15,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-12 22:35:15,951 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:15,951 INFO L85 PathProgramCache]: Analyzing trace with hash -313388890, now seen corresponding path program 3 times [2021-11-12 22:35:15,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:15,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864972760] [2021-11-12 22:35:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:15,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:16,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:16,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864972760] [2021-11-12 22:35:16,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864972760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:35:16,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256572075] [2021-11-12 22:35:16,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:35:16,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:16,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:16,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:16,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 22:35:16,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:35:16,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:35:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 22:35:16,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:16,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:17,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256572075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:17,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419138736] [2021-11-12 22:35:17,167 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:35:17,167 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:35:17,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:35:17,167 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:35:17,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:35:17,176 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,177 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:17,178 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,179 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:35:17,179 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:17,181 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:35:17,183 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-12 22:35:17,193 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-12 22:35:17,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 22:35:17,205 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,206 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:17,206 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:17,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:17,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:17,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 22:35:17,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:35:17,239 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:35:17,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:17,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,246 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,247 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-12 22:35:17,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:35:17,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-12 22:35:17,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-12 22:35:17,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,303 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,310 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:17,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,313 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:35:17,328 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 313 [2021-11-12 22:35:17,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:17,399 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.6 percent of original size [2021-11-12 22:35:17,402 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:17,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:17,405 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:35:17,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-12 22:35:17,417 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:35:17,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:35:17,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:35:17,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2021-11-12 22:35:17,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137309998] [2021-11-12 22:35:17,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:35:17,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-12 22:35:17,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:17,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-12 22:35:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=998, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 22:35:17,836 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:35:30,847 WARN L227 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:35:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:51,466 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-12 22:35:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 22:35:51,467 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 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 14 [2021-11-12 22:35:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:51,468 INFO L225 Difference]: With dead ends: 30 [2021-11-12 22:35:51,468 INFO L226 Difference]: Without dead ends: 27 [2021-11-12 22:35:51,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=674, Invalid=1488, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 22:35:51,470 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 801.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.86ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 847.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:51,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 221 Unknown, 0 Unchecked, 3.86ms Time], IncrementalHoareTripleChecker [21 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 847.64ms Time] [2021-11-12 22:35:51,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-12 22:35:51,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-12 22:35:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:35:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-12 22:35:51,479 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-12 22:35:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:51,479 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-12 22:35:51,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:35:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-12 22:35:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 22:35:51,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:51,481 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-12 22:35:51,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:51,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:51,698 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:51,699 INFO L85 PathProgramCache]: Analyzing trace with hash 292652646, now seen corresponding path program 4 times [2021-11-12 22:35:51,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:51,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177316928] [2021-11-12 22:35:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:51,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:52,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:52,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177316928] [2021-11-12 22:35:52,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177316928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:35:52,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443445087] [2021-11-12 22:35:52,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:35:52,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:52,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:52,639 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:52,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 22:35:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:52,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-12 22:35:52,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:54,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:56,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443445087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:56,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1457302818] [2021-11-12 22:35:56,688 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:35:56,688 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:35:56,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:35:56,689 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:35:56,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:35:56,697 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,698 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:56,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:35:56,700 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:56,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,701 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:35:56,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-12 22:35:56,706 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-12 22:35:56,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 22:35:56,717 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,717 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:56,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:56,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:56,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:56,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 22:35:56,741 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,743 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:35:56,744 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,745 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 22:35:56,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:56,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,751 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-12 22:35:56,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:35:56,753 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-12 22:35:56,756 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,759 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-12 22:35:56,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,801 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,807 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:56,808 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,809 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:35:56,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 313 [2021-11-12 22:35:56,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:56,890 INFO L180 QuantifierPusher]: treesize reduction 36, result has 67.6 percent of original size [2021-11-12 22:35:56,895 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:56,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:56,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:35:56,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-12 22:35:56,911 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:35:57,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:35:57,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:35:57,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2021-11-12 22:35:57,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341269926] [2021-11-12 22:35:57,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:35:57,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-12 22:35:57,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-12 22:35:57,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1290, Invalid=3966, Unknown=0, NotChecked=0, Total=5256 [2021-11-12 22:35:57,945 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:36:00,441 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296)) (.cse3 (mod (+ 16 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse10 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296)) (.cse13 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296)) (.cse7 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (.cse14 (mod (+ 19 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse2 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 20) 4294967296)) (.cse5 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296)) (.cse6 (mod (+ 3 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse18 (mod (+ 2 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse8 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296)) (.cse12 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296)) (.cse16 (mod (+ 9 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse15 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296)) (.cse11 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296)) (.cse20 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296)) (.cse0 (mod (+ 21 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse17 (mod (+ 5 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse22 (mod (+ 6 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse21 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse19 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296)) (.cse9 (mod (+ 14 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296))) (and (or (< .cse0 .cse1) (<= .cse1 .cse2)) (or (< .cse3 .cse1) (<= .cse1 .cse4)) (or (< .cse5 .cse1) (<= .cse1 .cse6)) (or (<= .cse1 .cse7) (< .cse8 .cse1)) (or (< .cse4 .cse1) (<= .cse1 .cse9)) (or (<= .cse1 .cse3) (< .cse10 .cse1)) (or (<= .cse1 .cse11) (< .cse12 .cse1)) (or (<= .cse1 .cse13) (< .cse14 .cse1)) (or (<= .cse1 .cse10) (< .cse13 .cse1)) (< .cse7 .cse1) (or (<= .cse1 .cse14) (< .cse2 .cse1)) (or (< .cse15 .cse1) (<= .cse1 .cse16)) (or (<= .cse1 .cse5) (< .cse17 .cse1)) (or (<= .cse1 .cse18) (< .cse6 .cse1)) (or (< .cse18 .cse1) (<= .cse1 .cse8)) (or (<= .cse1 .cse12) (< .cse19 .cse1)) (or (< .cse16 .cse1) (<= .cse1 .cse20)) (or (<= .cse1 .cse15) (< .cse11 .cse1)) (or (<= .cse1 .cse21) (< .cse20 .cse1)) (or (< (mod (+ 22 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) .cse1) (<= .cse1 .cse0)) (or (< .cse22 .cse1) (<= .cse1 .cse17)) (or (<= .cse1 .cse22) (< .cse21 .cse1)) (or (<= .cse1 .cse19) (< .cse9 .cse1)))) is different from false [2021-11-12 22:36:02,466 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296)) (.cse2 (mod (+ 16 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse9 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296)) (.cse12 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296)) (.cse6 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (.cse13 (mod (+ 19 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 20) 4294967296)) (.cse4 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296)) (.cse5 (mod (+ 3 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse17 (mod (+ 2 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse7 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296)) (.cse11 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296)) (.cse15 (mod (+ 9 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse14 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296)) (.cse10 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296)) (.cse19 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296)) (.cse16 (mod (+ 5 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse21 (mod (+ 6 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse20 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse18 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296)) (.cse8 (mod (+ 14 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296))) (and (or (< (mod (+ 21 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) .cse0) (<= .cse0 .cse1)) (or (< .cse2 .cse0) (<= .cse0 .cse3)) (or (< .cse4 .cse0) (<= .cse0 .cse5)) (or (<= .cse0 .cse6) (< .cse7 .cse0)) (or (< .cse3 .cse0) (<= .cse0 .cse8)) (or (<= .cse0 .cse2) (< .cse9 .cse0)) (or (<= .cse0 .cse10) (< .cse11 .cse0)) (or (<= .cse0 .cse12) (< .cse13 .cse0)) (or (<= .cse0 .cse9) (< .cse12 .cse0)) (< .cse6 .cse0) (or (<= .cse0 .cse13) (< .cse1 .cse0)) (or (< .cse14 .cse0) (<= .cse0 .cse15)) (or (<= .cse0 .cse4) (< .cse16 .cse0)) (or (<= .cse0 .cse17) (< .cse5 .cse0)) (or (< .cse17 .cse0) (<= .cse0 .cse7)) (or (<= .cse0 .cse11) (< .cse18 .cse0)) (or (< .cse15 .cse0) (<= .cse0 .cse19)) (or (<= .cse0 .cse14) (< .cse10 .cse0)) (or (<= .cse0 .cse20) (< .cse19 .cse0)) (or (< .cse21 .cse0) (<= .cse0 .cse16)) (or (<= .cse0 .cse21) (< .cse20 .cse0)) (or (<= .cse0 .cse18) (< .cse8 .cse0)))) is different from false [2021-11-12 22:36:04,489 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296)) (.cse0 (mod (+ 16 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse8 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296)) (.cse11 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296)) (.cse5 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (.cse12 (mod (+ 19 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse3 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296)) (.cse4 (mod (+ 3 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse16 (mod (+ 2 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse6 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296)) (.cse10 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296)) (.cse14 (mod (+ 9 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse13 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296)) (.cse9 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296)) (.cse18 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296)) (.cse15 (mod (+ 5 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse20 (mod (+ 6 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse19 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse17 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296)) (.cse7 (mod (+ 14 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296))) (and (or (< .cse0 .cse1) (<= .cse1 .cse2)) (or (< .cse3 .cse1) (<= .cse1 .cse4)) (or (<= .cse1 .cse5) (< .cse6 .cse1)) (or (< .cse2 .cse1) (<= .cse1 .cse7)) (or (<= .cse1 .cse0) (< .cse8 .cse1)) (or (<= .cse1 .cse9) (< .cse10 .cse1)) (or (<= .cse1 .cse11) (< .cse12 .cse1)) (or (<= .cse1 .cse8) (< .cse11 .cse1)) (< .cse5 .cse1) (or (<= .cse1 .cse12) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 20) 4294967296) .cse1)) (or (< .cse13 .cse1) (<= .cse1 .cse14)) (or (<= .cse1 .cse3) (< .cse15 .cse1)) (or (<= .cse1 .cse16) (< .cse4 .cse1)) (or (< .cse16 .cse1) (<= .cse1 .cse6)) (or (<= .cse1 .cse10) (< .cse17 .cse1)) (or (< .cse14 .cse1) (<= .cse1 .cse18)) (or (<= .cse1 .cse13) (< .cse9 .cse1)) (or (<= .cse1 .cse19) (< .cse18 .cse1)) (or (< .cse20 .cse1) (<= .cse1 .cse15)) (or (<= .cse1 .cse20) (< .cse19 .cse1)) (or (<= .cse1 .cse17) (< .cse7 .cse1)))) is different from false [2021-11-12 22:36:06,500 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296)) (.cse0 (mod (+ 16 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse8 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296)) (.cse11 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296)) (.cse5 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (.cse3 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296)) (.cse4 (mod (+ 3 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse15 (mod (+ 2 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse6 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296)) (.cse10 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296)) (.cse13 (mod (+ 9 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse12 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296)) (.cse9 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296)) (.cse17 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296)) (.cse14 (mod (+ 5 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse19 (mod (+ 6 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse18 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse16 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296)) (.cse7 (mod (+ 14 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296))) (and (or (< .cse0 .cse1) (<= .cse1 .cse2)) (or (< .cse3 .cse1) (<= .cse1 .cse4)) (or (<= .cse1 .cse5) (< .cse6 .cse1)) (or (< .cse2 .cse1) (<= .cse1 .cse7)) (or (<= .cse1 .cse0) (< .cse8 .cse1)) (or (<= .cse1 .cse9) (< .cse10 .cse1)) (or (<= .cse1 .cse11) (< (mod (+ 19 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) .cse1)) (or (<= .cse1 .cse8) (< .cse11 .cse1)) (< .cse5 .cse1) (or (< .cse12 .cse1) (<= .cse1 .cse13)) (or (<= .cse1 .cse3) (< .cse14 .cse1)) (or (<= .cse1 .cse15) (< .cse4 .cse1)) (or (< .cse15 .cse1) (<= .cse1 .cse6)) (or (<= .cse1 .cse10) (< .cse16 .cse1)) (or (< .cse13 .cse1) (<= .cse1 .cse17)) (or (<= .cse1 .cse12) (< .cse9 .cse1)) (or (<= .cse1 .cse18) (< .cse17 .cse1)) (or (< .cse19 .cse1) (<= .cse1 .cse14)) (or (<= .cse1 .cse19) (< .cse18 .cse1)) (or (<= .cse1 .cse16) (< .cse7 .cse1)))) is different from false [2021-11-12 22:36:08,510 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296)) (.cse0 (mod (+ 16 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse8 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296)) (.cse5 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (.cse3 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296)) (.cse4 (mod (+ 3 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse14 (mod (+ 2 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse6 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296)) (.cse10 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296)) (.cse12 (mod (+ 9 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse11 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296)) (.cse9 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296)) (.cse16 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296)) (.cse13 (mod (+ 5 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse18 (mod (+ 6 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse17 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse15 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296)) (.cse7 (mod (+ 14 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296))) (and (or (< .cse0 .cse1) (<= .cse1 .cse2)) (or (< .cse3 .cse1) (<= .cse1 .cse4)) (or (<= .cse1 .cse5) (< .cse6 .cse1)) (or (< .cse2 .cse1) (<= .cse1 .cse7)) (or (<= .cse1 .cse0) (< .cse8 .cse1)) (or (<= .cse1 .cse9) (< .cse10 .cse1)) (or (<= .cse1 .cse8) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296) .cse1)) (< .cse5 .cse1) (or (< .cse11 .cse1) (<= .cse1 .cse12)) (or (<= .cse1 .cse3) (< .cse13 .cse1)) (or (<= .cse1 .cse14) (< .cse4 .cse1)) (or (< .cse14 .cse1) (<= .cse1 .cse6)) (or (<= .cse1 .cse10) (< .cse15 .cse1)) (or (< .cse12 .cse1) (<= .cse1 .cse16)) (or (<= .cse1 .cse11) (< .cse9 .cse1)) (or (<= .cse1 .cse17) (< .cse16 .cse1)) (or (< .cse18 .cse1) (<= .cse1 .cse13)) (or (<= .cse1 .cse18) (< .cse17 .cse1)) (or (<= .cse1 .cse15) (< .cse7 .cse1)))) is different from false [2021-11-12 22:36:10,522 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296)) (.cse0 (mod (+ 16 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse5 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (.cse3 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296)) (.cse4 (mod (+ 3 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse13 (mod (+ 2 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse6 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296)) (.cse9 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296)) (.cse11 (mod (+ 9 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse10 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296)) (.cse8 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296)) (.cse15 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296)) (.cse12 (mod (+ 5 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse17 (mod (+ 6 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse16 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse14 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296)) (.cse7 (mod (+ 14 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296))) (and (or (< .cse0 .cse1) (<= .cse1 .cse2)) (or (< .cse3 .cse1) (<= .cse1 .cse4)) (or (<= .cse1 .cse5) (< .cse6 .cse1)) (or (< .cse2 .cse1) (<= .cse1 .cse7)) (or (<= .cse1 .cse0) (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296) .cse1)) (or (<= .cse1 .cse8) (< .cse9 .cse1)) (< .cse5 .cse1) (or (< .cse10 .cse1) (<= .cse1 .cse11)) (or (<= .cse1 .cse3) (< .cse12 .cse1)) (or (<= .cse1 .cse13) (< .cse4 .cse1)) (or (< .cse13 .cse1) (<= .cse1 .cse6)) (or (<= .cse1 .cse9) (< .cse14 .cse1)) (or (< .cse11 .cse1) (<= .cse1 .cse15)) (or (<= .cse1 .cse10) (< .cse8 .cse1)) (or (<= .cse1 .cse16) (< .cse15 .cse1)) (or (< .cse17 .cse1) (<= .cse1 .cse12)) (or (<= .cse1 .cse17) (< .cse16 .cse1)) (or (<= .cse1 .cse14) (< .cse7 .cse1)))) is different from false [2021-11-12 22:38:26,402 WARN L227 SmtUtils]: Spent 1.82m on a formula simplification. DAG size of input: 103 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:38:29,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:12,941 WARN L227 SmtUtils]: Spent 1.34m on a formula simplification. DAG size of input: 97 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:40:15,492 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (.cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296)) (.cse2 (mod (+ 3 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse10 (mod (+ 2 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse4 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296)) (.cse6 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296)) (.cse8 (mod (+ 9 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse7 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296)) (.cse5 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296)) (.cse12 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296)) (.cse9 (mod (+ 5 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse14 (mod (+ 6 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse13 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse11 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296))) (and (or (< .cse0 .cse1) (<= .cse1 .cse2)) (or (<= .cse1 .cse3) (< .cse4 .cse1)) (or (<= .cse1 .cse5) (< .cse6 .cse1)) (< .cse3 .cse1) (or (< .cse7 .cse1) (<= .cse1 .cse8)) (or (<= .cse1 .cse0) (< .cse9 .cse1)) (or (<= .cse1 .cse10) (< .cse2 .cse1)) (or (< .cse10 .cse1) (<= .cse1 .cse4)) (or (<= .cse1 .cse6) (< .cse11 .cse1)) (or (< .cse8 .cse1) (<= .cse1 .cse12)) (or (<= .cse1 .cse7) (< .cse5 .cse1)) (or (<= .cse1 .cse13) (< .cse12 .cse1)) (or (< .cse14 .cse1) (<= .cse1 .cse9)) (or (<= .cse1 .cse14) (< .cse13 .cse1)) (or (<= .cse1 .cse11) (< (mod (+ 14 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) .cse1)))) is different from false [2021-11-12 22:41:33,341 WARN L227 SmtUtils]: Spent 57.22s on a formula simplification. DAG size of input: 85 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:41:34,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:24,045 WARN L227 SmtUtils]: Spent 30.53s on a formula simplification. DAG size of input: 79 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:43:11,998 WARN L227 SmtUtils]: Spent 32.31s on a formula simplification. DAG size of input: 73 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:43:43,889 WARN L227 SmtUtils]: Spent 16.24s on a formula simplification. DAG size of input: 67 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:44:02,031 WARN L227 SmtUtils]: Spent 11.28s on a formula simplification. DAG size of input: 61 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:44:26,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:44:26,051 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-12 22:44:26,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-12 22:44:26,052 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 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 26 [2021-11-12 22:44:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:44:26,053 INFO L225 Difference]: With dead ends: 54 [2021-11-12 22:44:26,053 INFO L226 Difference]: Without dead ends: 51 [2021-11-12 22:44:26,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 505.9s TimeCoverageRelationStatistics Valid=2251, Invalid=5422, Unknown=11, NotChecked=1246, Total=8930 [2021-11-12 22:44:26,058 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6768.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.55ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 6869.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:44:26,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 747 Unknown, 0 Unchecked, 4.55ms Time], IncrementalHoareTripleChecker [27 Valid, 713 Invalid, 0 Unknown, 7 Unchecked, 6869.12ms Time] [2021-11-12 22:44:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-12 22:44:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-12 22:44:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:44:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-12 22:44:26,071 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-11-12 22:44:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:44:26,071 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-12 22:44:26,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:44:26,072 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-12 22:44:26,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-12 22:44:26,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:44:26,074 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2021-11-12 22:44:26,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:44:26,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-12 22:44:26,295 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:44:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:44:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1910018534, now seen corresponding path program 5 times [2021-11-12 22:44:26,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:44:26,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560717700] [2021-11-12 22:44:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:44:26,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:44:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:44:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:44:28,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:44:28,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560717700] [2021-11-12 22:44:28,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560717700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:44:28,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628954378] [2021-11-12 22:44:28,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:44:28,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:44:28,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:44:28,551 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:44:28,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50b81b19-3aa2-4d86-b699-dbe3e9662868/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process