./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label10.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_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/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_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/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_2076ff6b-9ae0-4666-ad98-5fb431bc8994/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 5f4b32ab55ef7da7a1c45381b7a9ca93704fa76788ea88b9dbed6ebccc0ba509 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:36:10,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:36:10,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:36:10,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:36:10,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:36:10,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:36:10,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:36:10,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:36:10,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:36:10,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:36:10,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:36:10,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:36:10,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:36:10,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:36:10,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:36:10,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:36:10,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:36:10,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:36:10,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:36:10,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:36:10,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:36:10,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:36:10,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:36:10,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:36:10,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:36:10,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:36:10,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:36:10,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:36:10,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:36:10,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:36:10,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:36:10,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:36:10,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:36:10,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:36:10,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:36:10,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:36:10,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:36:10,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:36:10,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:36:10,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:36:10,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:36:10,206 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:36:10,266 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:36:10,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:36:10,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:36:10,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:36:10,269 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:36:10,269 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:36:10,269 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:36:10,269 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:36:10,270 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:36:10,270 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:36:10,271 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:36:10,272 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:36:10,272 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:36:10,273 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:36:10,273 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:36:10,273 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:36:10,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:36:10,275 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:36:10,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:36:10,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:36:10,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:36:10,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:36:10,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:36:10,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:36:10,276 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:36:10,277 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:36:10,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:36:10,277 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:36:10,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:36:10,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:36:10,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:36:10,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:36:10,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:36:10,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:36:10,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:36:10,280 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:36:10,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:36:10,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:36:10,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:36:10,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:36:10,281 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_2076ff6b-9ae0-4666-ad98-5fb431bc8994/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f4b32ab55ef7da7a1c45381b7a9ca93704fa76788ea88b9dbed6ebccc0ba509 [2021-11-12 23:36:10,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:36:10,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:36:10,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:36:10,665 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:36:10,666 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:36:10,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/eca-rers2012/Problem01_label10.c [2021-11-12 23:36:10,769 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/data/1ec7dfb1d/55336a265f6b49a18656949f48055c83/FLAG2677b9d2d [2021-11-12 23:36:11,605 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:36:11,605 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/sv-benchmarks/c/eca-rers2012/Problem01_label10.c [2021-11-12 23:36:11,620 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/data/1ec7dfb1d/55336a265f6b49a18656949f48055c83/FLAG2677b9d2d [2021-11-12 23:36:11,758 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/data/1ec7dfb1d/55336a265f6b49a18656949f48055c83 [2021-11-12 23:36:11,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:36:11,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:36:11,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:36:11,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:36:11,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:36:11,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:36:11" (1/1) ... [2021-11-12 23:36:11,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@460f399b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:11, skipping insertion in model container [2021-11-12 23:36:11,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:36:11" (1/1) ... [2021-11-12 23:36:11,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:36:11,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:36:12,261 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_2076ff6b-9ae0-4666-ad98-5fb431bc8994/sv-benchmarks/c/eca-rers2012/Problem01_label10.c[19224,19237] [2021-11-12 23:36:12,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:36:12,310 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:36:12,506 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_2076ff6b-9ae0-4666-ad98-5fb431bc8994/sv-benchmarks/c/eca-rers2012/Problem01_label10.c[19224,19237] [2021-11-12 23:36:12,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:36:12,538 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:36:12,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12 WrapperNode [2021-11-12 23:36:12,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:36:12,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:36:12,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:36:12,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:36:12,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:36:12,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:36:12,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:36:12,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:36:12,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:36:12,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:36:12,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:36:12,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:36:12,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12" (1/1) ... [2021-11-12 23:36:12,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:36:12,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:36:12,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:36:12,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:36:12,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:36:12,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:36:12,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:36:12,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:36:14,455 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:36:14,455 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:36:14,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:36:14 BoogieIcfgContainer [2021-11-12 23:36:14,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:36:14,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:36:14,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:36:14,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:36:14,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:36:11" (1/3) ... [2021-11-12 23:36:14,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cd1b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:36:14, skipping insertion in model container [2021-11-12 23:36:14,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:36:12" (2/3) ... [2021-11-12 23:36:14,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cd1b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:36:14, skipping insertion in model container [2021-11-12 23:36:14,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:36:14" (3/3) ... [2021-11-12 23:36:14,471 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label10.c [2021-11-12 23:36:14,477 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:36:14,478 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:36:14,540 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:36:14,549 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 23:36:14,549 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:36:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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 23:36:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:36:14,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:14,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:14,582 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:14,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:14,589 INFO L85 PathProgramCache]: Analyzing trace with hash 379024519, now seen corresponding path program 1 times [2021-11-12 23:36:14,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:14,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445559512] [2021-11-12 23:36:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:14,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:15,286 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 23:36:15,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:15,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445559512] [2021-11-12 23:36:15,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445559512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:15,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:15,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:36:15,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327958283] [2021-11-12 23:36:15,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:15,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:36:15,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:15,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:36:15,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:36:15,349 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 23:36:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:16,293 INFO L93 Difference]: Finished difference Result 297 states and 569 transitions. [2021-11-12 23:36:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:36:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2021-11-12 23:36:16,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:16,316 INFO L225 Difference]: With dead ends: 297 [2021-11-12 23:36:16,316 INFO L226 Difference]: Without dead ends: 216 [2021-11-12 23:36:16,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:36:16,324 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 172 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 610.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.20ms SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 756.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:16,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 35 Invalid, 478 Unknown, 0 Unchecked, 18.20ms Time], IncrementalHoareTripleChecker [122 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 756.94ms Time] [2021-11-12 23:36:16,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-12 23:36:16,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-11-12 23:36:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5627906976744186) internal successors, (336), 215 states have internal predecessors, (336), 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 23:36:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 336 transitions. [2021-11-12 23:36:16,413 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 336 transitions. Word has length 71 [2021-11-12 23:36:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:16,414 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 336 transitions. [2021-11-12 23:36:16,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 23:36:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 336 transitions. [2021-11-12 23:36:16,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 23:36:16,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:16,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:16,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:36:16,432 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:16,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1583654790, now seen corresponding path program 1 times [2021-11-12 23:36:16,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:16,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764522967] [2021-11-12 23:36:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:16,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:36:16,789 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:16,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764522967] [2021-11-12 23:36:16,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764522967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:16,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:16,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:36:16,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394246209] [2021-11-12 23:36:16,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:16,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:36:16,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:16,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:36:16,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:36:16,798 INFO L87 Difference]: Start difference. First operand 216 states and 336 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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 23:36:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:17,576 INFO L93 Difference]: Finished difference Result 500 states and 848 transitions. [2021-11-12 23:36:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:36:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2021-11-12 23:36:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:17,581 INFO L225 Difference]: With dead ends: 500 [2021-11-12 23:36:17,581 INFO L226 Difference]: Without dead ends: 287 [2021-11-12 23:36:17,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:36:17,587 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 68 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 587.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.26ms SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 713.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:17,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 77 Invalid, 501 Unknown, 0 Unchecked, 11.26ms Time], IncrementalHoareTripleChecker [133 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 713.98ms Time] [2021-11-12 23:36:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-12 23:36:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 216. [2021-11-12 23:36:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.3627906976744186) internal successors, (293), 215 states have internal predecessors, (293), 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 23:36:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 293 transitions. [2021-11-12 23:36:17,614 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 293 transitions. Word has length 78 [2021-11-12 23:36:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:17,614 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 293 transitions. [2021-11-12 23:36:17,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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 23:36:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 293 transitions. [2021-11-12 23:36:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:36:17,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:17,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:17,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:36:17,618 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:17,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2090519880, now seen corresponding path program 1 times [2021-11-12 23:36:17,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:17,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030612532] [2021-11-12 23:36:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:17,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:36:17,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:17,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030612532] [2021-11-12 23:36:17,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030612532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:17,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:17,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:36:17,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069012292] [2021-11-12 23:36:17,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:17,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:36:17,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:17,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:36:17,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:36:17,689 INFO L87 Difference]: Start difference. First operand 216 states and 293 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 23:36:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:17,997 INFO L93 Difference]: Finished difference Result 502 states and 684 transitions. [2021-11-12 23:36:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:36:17,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 86 [2021-11-12 23:36:17,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:18,000 INFO L225 Difference]: With dead ends: 502 [2021-11-12 23:36:18,000 INFO L226 Difference]: Without dead ends: 287 [2021-11-12 23:36:18,002 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 23:36:18,004 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 232.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.30ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 289.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:18,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 43 Invalid, 212 Unknown, 0 Unchecked, 2.30ms Time], IncrementalHoareTripleChecker [32 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 289.35ms Time] [2021-11-12 23:36:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-12 23:36:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-11-12 23:36:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.3146853146853146) internal successors, (376), 286 states have internal predecessors, (376), 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 23:36:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 376 transitions. [2021-11-12 23:36:18,034 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 376 transitions. Word has length 86 [2021-11-12 23:36:18,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:18,034 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 376 transitions. [2021-11-12 23:36:18,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 23:36:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 376 transitions. [2021-11-12 23:36:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:36:18,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:18,038 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:18,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:36:18,038 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1999068742, now seen corresponding path program 1 times [2021-11-12 23:36:18,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:18,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751899896] [2021-11-12 23:36:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:18,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:36:18,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:18,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751899896] [2021-11-12 23:36:18,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751899896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:18,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:18,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:36:18,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231254117] [2021-11-12 23:36:18,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:18,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:36:18,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:18,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:36:18,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:36:18,154 INFO L87 Difference]: Start difference. First operand 287 states and 376 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 23:36:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:18,516 INFO L93 Difference]: Finished difference Result 857 states and 1125 transitions. [2021-11-12 23:36:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:36:18,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 95 [2021-11-12 23:36:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:18,522 INFO L225 Difference]: With dead ends: 857 [2021-11-12 23:36:18,522 INFO L226 Difference]: Without dead ends: 571 [2021-11-12 23:36:18,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 23:36:18,525 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 269.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.30ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 335.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:18,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 26 Invalid, 246 Unknown, 0 Unchecked, 3.30ms Time], IncrementalHoareTripleChecker [47 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 335.56ms Time] [2021-11-12 23:36:18,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-12 23:36:18,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 500. [2021-11-12 23:36:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.346693386773547) internal successors, (672), 499 states have internal predecessors, (672), 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 23:36:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 672 transitions. [2021-11-12 23:36:18,552 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 672 transitions. Word has length 95 [2021-11-12 23:36:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:18,553 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 672 transitions. [2021-11-12 23:36:18,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 23:36:18,554 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 672 transitions. [2021-11-12 23:36:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:36:18,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:18,557 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:18,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:36:18,558 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash -7149510, now seen corresponding path program 1 times [2021-11-12 23:36:18,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:18,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920107358] [2021-11-12 23:36:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:18,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:36:18,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:18,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920107358] [2021-11-12 23:36:18,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920107358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:18,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:18,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:36:18,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350627708] [2021-11-12 23:36:18,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:18,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:36:18,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:18,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:36:18,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:36:18,651 INFO L87 Difference]: Start difference. First operand 500 states and 672 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:36:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:19,096 INFO L93 Difference]: Finished difference Result 1283 states and 1772 transitions. [2021-11-12 23:36:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:36:19,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-12 23:36:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:19,101 INFO L225 Difference]: With dead ends: 1283 [2021-11-12 23:36:19,102 INFO L226 Difference]: Without dead ends: 784 [2021-11-12 23:36:19,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:36:19,104 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 137 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 324.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.02ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 404.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:19,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 31 Invalid, 370 Unknown, 0 Unchecked, 4.02ms Time], IncrementalHoareTripleChecker [89 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 404.15ms Time] [2021-11-12 23:36:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-11-12 23:36:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 571. [2021-11-12 23:36:19,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.317543859649123) internal successors, (751), 570 states have internal predecessors, (751), 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 23:36:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 751 transitions. [2021-11-12 23:36:19,135 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 751 transitions. Word has length 120 [2021-11-12 23:36:19,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:19,138 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 751 transitions. [2021-11-12 23:36:19,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:36:19,139 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 751 transitions. [2021-11-12 23:36:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:36:19,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:19,141 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:19,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:36:19,142 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1720304535, now seen corresponding path program 1 times [2021-11-12 23:36:19,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:19,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662408109] [2021-11-12 23:36:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:19,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:36:19,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:19,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662408109] [2021-11-12 23:36:19,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662408109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:19,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:19,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:36:19,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898279173] [2021-11-12 23:36:19,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:19,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:36:19,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:19,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:36:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:36:19,286 INFO L87 Difference]: Start difference. First operand 571 states and 751 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 23:36:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:19,579 INFO L93 Difference]: Finished difference Result 1212 states and 1617 transitions. [2021-11-12 23:36:19,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:36:19,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 134 [2021-11-12 23:36:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:19,585 INFO L225 Difference]: With dead ends: 1212 [2021-11-12 23:36:19,585 INFO L226 Difference]: Without dead ends: 642 [2021-11-12 23:36:19,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 23:36:19,587 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 54 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 210.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 264.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:19,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 41 Invalid, 233 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [29 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 264.86ms Time] [2021-11-12 23:36:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-12 23:36:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2021-11-12 23:36:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.3151326053042123) internal successors, (843), 641 states have internal predecessors, (843), 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 23:36:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 843 transitions. [2021-11-12 23:36:19,613 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 843 transitions. Word has length 134 [2021-11-12 23:36:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:19,614 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 843 transitions. [2021-11-12 23:36:19,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 23:36:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 843 transitions. [2021-11-12 23:36:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-12 23:36:19,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:19,620 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:19,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:36:19,621 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:19,622 INFO L85 PathProgramCache]: Analyzing trace with hash 404231995, now seen corresponding path program 1 times [2021-11-12 23:36:19,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:19,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689446591] [2021-11-12 23:36:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:19,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-12 23:36:19,750 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:19,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689446591] [2021-11-12 23:36:19,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689446591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:19,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:19,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:36:19,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908211952] [2021-11-12 23:36:19,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:19,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:36:19,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:36:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:36:19,753 INFO L87 Difference]: Start difference. First operand 642 states and 843 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 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 23:36:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:20,230 INFO L93 Difference]: Finished difference Result 1567 states and 2049 transitions. [2021-11-12 23:36:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:36:20,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 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 159 [2021-11-12 23:36:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:20,237 INFO L225 Difference]: With dead ends: 1567 [2021-11-12 23:36:20,237 INFO L226 Difference]: Without dead ends: 926 [2021-11-12 23:36:20,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:36:20,240 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 141 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 364.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.65ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 440.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:20,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 43 Invalid, 443 Unknown, 0 Unchecked, 2.65ms Time], IncrementalHoareTripleChecker [47 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 440.11ms Time] [2021-11-12 23:36:20,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-11-12 23:36:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 855. [2021-11-12 23:36:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.2985948477751756) internal successors, (1109), 854 states have internal predecessors, (1109), 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 23:36:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1109 transitions. [2021-11-12 23:36:20,271 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1109 transitions. Word has length 159 [2021-11-12 23:36:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:20,272 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1109 transitions. [2021-11-12 23:36:20,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 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 23:36:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1109 transitions. [2021-11-12 23:36:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-12 23:36:20,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:20,276 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:20,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:36:20,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:20,278 INFO L85 PathProgramCache]: Analyzing trace with hash -280554568, now seen corresponding path program 1 times [2021-11-12 23:36:20,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:20,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726660082] [2021-11-12 23:36:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:20,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:36:20,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:20,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726660082] [2021-11-12 23:36:20,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726660082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:20,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:20,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:36:20,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561549621] [2021-11-12 23:36:20,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:20,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:36:20,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:20,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:36:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:36:20,417 INFO L87 Difference]: Start difference. First operand 855 states and 1109 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 23:36:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:20,929 INFO L93 Difference]: Finished difference Result 1851 states and 2370 transitions. [2021-11-12 23:36:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:36:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 176 [2021-11-12 23:36:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:20,936 INFO L225 Difference]: With dead ends: 1851 [2021-11-12 23:36:20,936 INFO L226 Difference]: Without dead ends: 997 [2021-11-12 23:36:20,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:36:20,938 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 379.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.13ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 473.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:20,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 26 Invalid, 464 Unknown, 0 Unchecked, 3.13ms Time], IncrementalHoareTripleChecker [104 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 473.31ms Time] [2021-11-12 23:36:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-11-12 23:36:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 855. [2021-11-12 23:36:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.2552693208430914) internal successors, (1072), 854 states have internal predecessors, (1072), 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 23:36:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1072 transitions. [2021-11-12 23:36:20,963 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1072 transitions. Word has length 176 [2021-11-12 23:36:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:20,964 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1072 transitions. [2021-11-12 23:36:20,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 23:36:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1072 transitions. [2021-11-12 23:36:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-12 23:36:20,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:20,968 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:20,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:36:20,969 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash -915526728, now seen corresponding path program 1 times [2021-11-12 23:36:20,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:20,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497615939] [2021-11-12 23:36:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:20,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-12 23:36:21,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:21,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497615939] [2021-11-12 23:36:21,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497615939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:21,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:21,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:36:21,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539034572] [2021-11-12 23:36:21,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:21,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:36:21,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:21,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:36:21,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:36:21,065 INFO L87 Difference]: Start difference. First operand 855 states and 1072 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 23:36:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:21,396 INFO L93 Difference]: Finished difference Result 1851 states and 2296 transitions. [2021-11-12 23:36:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:36:21,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 219 [2021-11-12 23:36:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:21,403 INFO L225 Difference]: With dead ends: 1851 [2021-11-12 23:36:21,403 INFO L226 Difference]: Without dead ends: 997 [2021-11-12 23:36:21,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 23:36:21,406 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 254.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 303.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:21,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 111 Invalid, 239 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [31 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 303.71ms Time] [2021-11-12 23:36:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-11-12 23:36:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 926. [2021-11-12 23:36:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.202162162162162) internal successors, (1112), 925 states have internal predecessors, (1112), 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 23:36:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1112 transitions. [2021-11-12 23:36:21,435 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1112 transitions. Word has length 219 [2021-11-12 23:36:21,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:21,435 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1112 transitions. [2021-11-12 23:36:21,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 23:36:21,436 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1112 transitions. [2021-11-12 23:36:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-12 23:36:21,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:21,442 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:21,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:36:21,442 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:21,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1896308623, now seen corresponding path program 1 times [2021-11-12 23:36:21,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:21,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385133981] [2021-11-12 23:36:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:21,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 256 proven. 142 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:36:21,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:21,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385133981] [2021-11-12 23:36:21,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385133981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:36:21,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352719820] [2021-11-12 23:36:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:21,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:36:21,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:36:21,653 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:36:21,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:36:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:21,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:36:21,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-12 23:36:22,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-12 23:36:23,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352719820] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:23,025 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:36:23,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2021-11-12 23:36:23,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126289064] [2021-11-12 23:36:23,026 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:23,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:36:23,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:23,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:36:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:36:23,028 INFO L87 Difference]: Start difference. First operand 926 states and 1112 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 23:36:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:23,313 INFO L93 Difference]: Finished difference Result 1849 states and 2222 transitions. [2021-11-12 23:36:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:36:23,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 241 [2021-11-12 23:36:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:23,315 INFO L225 Difference]: With dead ends: 1849 [2021-11-12 23:36:23,315 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 23:36:23,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 481 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:36:23,318 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 210.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 257.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:23,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 230 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [22 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 257.69ms Time] [2021-11-12 23:36:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 23:36:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 23:36:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:36:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 23:36:23,321 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 241 [2021-11-12 23:36:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:23,321 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 23:36:23,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 23:36:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 23:36:23,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 23:36:23,324 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:36:23,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-12 23:36:23,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-12 23:36:23,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 23:36:24,072 INFO L858 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-11-12 23:36:24,072 INFO L858 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-11-12 23:36:24,072 INFO L858 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-11-12 23:36:24,073 INFO L858 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-11-12 23:36:24,073 INFO L858 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-11-12 23:36:24,073 INFO L858 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-11-12 23:36:24,073 INFO L858 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-11-12 23:36:24,073 INFO L858 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-11-12 23:36:24,074 INFO L858 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-11-12 23:36:24,074 INFO L858 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-11-12 23:36:24,074 INFO L858 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-11-12 23:36:24,074 INFO L858 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-11-12 23:36:24,074 INFO L858 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-11-12 23:36:24,074 INFO L858 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-11-12 23:36:24,075 INFO L858 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-11-12 23:36:24,075 INFO L858 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-11-12 23:36:24,075 INFO L858 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-11-12 23:36:24,075 INFO L858 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-11-12 23:36:24,075 INFO L858 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-11-12 23:36:24,075 INFO L858 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-11-12 23:36:24,076 INFO L858 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-11-12 23:36:24,076 INFO L858 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-11-12 23:36:24,076 INFO L858 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-11-12 23:36:24,076 INFO L858 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-11-12 23:36:24,076 INFO L858 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-11-12 23:36:24,076 INFO L858 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-11-12 23:36:24,077 INFO L858 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-11-12 23:36:24,077 INFO L858 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-11-12 23:36:24,077 INFO L858 garLoopResultBuilder]: For program point L512-1(lines 40 585) no Hoare annotation was computed. [2021-11-12 23:36:24,077 INFO L858 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-11-12 23:36:24,077 INFO L858 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-11-12 23:36:24,077 INFO L858 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-11-12 23:36:24,078 INFO L858 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-11-12 23:36:24,078 INFO L858 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-11-12 23:36:24,078 INFO L858 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-11-12 23:36:24,078 INFO L858 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-11-12 23:36:24,078 INFO L858 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-11-12 23:36:24,078 INFO L858 garLoopResultBuilder]: For program point L515-1(lines 40 585) no Hoare annotation was computed. [2021-11-12 23:36:24,078 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-12 23:36:24,079 INFO L858 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-11-12 23:36:24,079 INFO L858 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-11-12 23:36:24,079 INFO L858 garLoopResultBuilder]: For program point L516(line 516) no Hoare annotation was computed. [2021-11-12 23:36:24,079 INFO L858 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-11-12 23:36:24,080 INFO L854 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse3 (<= ~a21~0 0)) (.cse1 (<= ~a16~0 5)) (.cse2 (= ~a16~0 6)) (.cse4 (not (= ~a7~0 1))) (.cse0 (= ~a21~0 1))) (or (and .cse0 .cse1) (and .cse2 .cse3) (and .cse3 .cse1) (and .cse4 .cse0 (= ~a20~0 1)) (and .cse2 .cse4 .cse0))) [2021-11-12 23:36:24,080 INFO L858 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-11-12 23:36:24,080 INFO L858 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-11-12 23:36:24,080 INFO L858 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-11-12 23:36:24,080 INFO L858 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-11-12 23:36:24,080 INFO L858 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-11-12 23:36:24,081 INFO L858 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-11-12 23:36:24,081 INFO L858 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-11-12 23:36:24,081 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-12 23:36:24,081 INFO L858 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-11-12 23:36:24,081 INFO L861 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-11-12 23:36:24,081 INFO L858 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-11-12 23:36:24,082 INFO L858 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-11-12 23:36:24,082 INFO L858 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-11-12 23:36:24,082 INFO L858 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-11-12 23:36:24,082 INFO L858 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-11-12 23:36:24,082 INFO L858 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-11-12 23:36:24,082 INFO L858 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-11-12 23:36:24,083 INFO L858 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-11-12 23:36:24,083 INFO L858 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-11-12 23:36:24,083 INFO L858 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-11-12 23:36:24,083 INFO L858 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-11-12 23:36:24,083 INFO L858 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-11-12 23:36:24,083 INFO L858 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-11-12 23:36:24,084 INFO L854 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse3 (<= ~a21~0 0)) (.cse1 (<= ~a16~0 5)) (.cse2 (= ~a16~0 6)) (.cse4 (not (= ~a7~0 1))) (.cse0 (= ~a21~0 1))) (or (and .cse0 .cse1) (and .cse2 .cse3) (and .cse3 .cse1) (and .cse4 .cse0 (= ~a20~0 1)) (and .cse2 .cse4 .cse0))) [2021-11-12 23:36:24,084 INFO L858 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-11-12 23:36:24,084 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 516) no Hoare annotation was computed. [2021-11-12 23:36:24,084 INFO L858 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-11-12 23:36:24,084 INFO L858 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-11-12 23:36:24,084 INFO L858 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-11-12 23:36:24,085 INFO L858 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-11-12 23:36:24,085 INFO L858 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-11-12 23:36:24,085 INFO L858 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-11-12 23:36:24,089 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:24,091 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:36:24,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:36:24 BoogieIcfgContainer [2021-11-12 23:36:24,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:36:24,110 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:36:24,110 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:36:24,111 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:36:24,111 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:36:14" (3/4) ... [2021-11-12 23:36:24,114 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-12 23:36:24,150 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 110 nodes and edges [2021-11-12 23:36:24,154 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-11-12 23:36:24,156 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-11-12 23:36:24,158 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-12 23:36:24,329 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 23:36:24,330 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:36:24,331 INFO L158 Benchmark]: Toolchain (without parser) took 12566.89ms. Allocated memory was 102.8MB in the beginning and 201.3MB in the end (delta: 98.6MB). Free memory was 67.3MB in the beginning and 115.1MB in the end (delta: -47.9MB). Peak memory consumption was 50.7MB. Max. memory is 16.1GB. [2021-11-12 23:36:24,331 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 102.8MB. Free memory was 73.7MB in the beginning and 73.7MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:36:24,331 INFO L158 Benchmark]: CACSL2BoogieTranslator took 761.22ms. Allocated memory is still 102.8MB. Free memory was 67.0MB in the beginning and 60.7MB in the end (delta: 6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:36:24,332 INFO L158 Benchmark]: Boogie Procedure Inliner took 148.67ms. Allocated memory is still 102.8MB. Free memory was 60.7MB in the beginning and 55.0MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-12 23:36:24,332 INFO L158 Benchmark]: Boogie Preprocessor took 113.28ms. Allocated memory is still 102.8MB. Free memory was 55.0MB in the beginning and 50.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-12 23:36:24,333 INFO L158 Benchmark]: RCFGBuilder took 1655.54ms. Allocated memory was 102.8MB in the beginning and 125.8MB in the end (delta: 23.1MB). Free memory was 50.8MB in the beginning and 76.4MB in the end (delta: -25.6MB). Peak memory consumption was 32.1MB. Max. memory is 16.1GB. [2021-11-12 23:36:24,334 INFO L158 Benchmark]: TraceAbstraction took 9647.98ms. Allocated memory was 125.8MB in the beginning and 201.3MB in the end (delta: 75.5MB). Free memory was 75.6MB in the beginning and 129.8MB in the end (delta: -54.2MB). Peak memory consumption was 78.5MB. Max. memory is 16.1GB. [2021-11-12 23:36:24,334 INFO L158 Benchmark]: Witness Printer took 219.63ms. Allocated memory is still 201.3MB. Free memory was 129.8MB in the beginning and 115.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:36:24,337 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 102.8MB. Free memory was 73.7MB in the beginning and 73.7MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 761.22ms. Allocated memory is still 102.8MB. Free memory was 67.0MB in the beginning and 60.7MB in the end (delta: 6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 148.67ms. Allocated memory is still 102.8MB. Free memory was 60.7MB in the beginning and 55.0MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 113.28ms. Allocated memory is still 102.8MB. Free memory was 55.0MB in the beginning and 50.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1655.54ms. Allocated memory was 102.8MB in the beginning and 125.8MB in the end (delta: 23.1MB). Free memory was 50.8MB in the beginning and 76.4MB in the end (delta: -25.6MB). Peak memory consumption was 32.1MB. Max. memory is 16.1GB. * TraceAbstraction took 9647.98ms. Allocated memory was 125.8MB in the beginning and 201.3MB in the end (delta: 75.5MB). Free memory was 75.6MB in the beginning and 129.8MB in the end (delta: -54.2MB). Peak memory consumption was 78.5MB. Max. memory is 16.1GB. * Witness Printer took 219.63ms. Allocated memory is still 201.3MB. Free memory was 129.8MB in the beginning and 115.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 516]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.6s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 841 SdHoareTripleChecker+Valid, 4239.66ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 841 mSDsluCounter, 536 SdHoareTripleChecker+Invalid, 3444.63ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 656 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2760 IncrementalHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 656 mSolverCounterUnsat, 474 mSDtfsCounter, 2760 mSolverCounterSat, 50.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 515 GetRequests, 494 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=926occurred in iteration=9, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 639 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 34 NumberOfFragments, 89 HoareAnnotationTreeSize, 3 FomulaSimplifications, 6 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 3 FomulaSimplificationsInter, 2378 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 1620 NumberOfCodeBlocks, 1620 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1849 ConstructedInterpolants, 0 QuantifiedInterpolants, 7244 SizeOfPredicates, 0 NumberOfNonLiveVariables, 539 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 12 InterpolantComputations, 11 PerfectInterpolantSequences, 2128/2270 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((a21 == 1 && a16 <= 5) || (a16 == 6 && a21 <= 0)) || (a21 <= 0 && a16 <= 5)) || ((!(a7 == 1) && a21 == 1) && a20 == 1)) || ((a16 == 6 && !(a7 == 1)) && a21 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((a21 == 1 && a16 <= 5) || (a16 == 6 && a21 <= 0)) || (a21 <= 0 && a16 <= 5)) || ((!(a7 == 1) && a21 == 1) && a20 == 1)) || ((a16 == 6 && !(a7 == 1)) && a21 == 1) RESULT: Ultimate proved your program to be correct! [2021-11-12 23:36:24,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2076ff6b-9ae0-4666-ad98-5fb431bc8994/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE