./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.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_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/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_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/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_f9410ede-c524-4a55-9fca-7b0b50b9105b/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 4f742293e1d7618171cf3a543c4629a6bee745f5c0d4fe8b828e91b8996c2b07 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:27:29,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:27:29,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:27:29,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:27:29,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:27:29,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:27:29,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:27:29,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:27:29,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:27:29,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:27:29,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:27:29,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:27:29,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:27:29,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:27:29,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:27:29,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:27:29,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:27:29,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:27:29,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:27:29,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:27:29,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:27:29,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:27:29,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:27:29,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:27:29,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:27:29,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:27:29,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:27:29,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:27:29,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:27:29,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:27:29,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:27:29,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:27:29,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:27:29,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:27:29,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:27:29,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:27:29,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:27:29,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:27:29,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:27:29,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:27:29,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:27:29,789 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:27:29,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:27:29,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:27:29,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:27:29,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:27:29,823 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:27:29,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:27:29,824 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:27:29,824 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:27:29,824 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:27:29,825 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:27:29,825 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:27:29,825 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:27:29,826 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:27:29,826 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:27:29,827 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:27:29,827 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:27:29,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:27:29,829 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:27:29,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:27:29,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:27:29,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:27:29,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:27:29,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:27:29,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:27:29,831 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:27:29,831 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:27:29,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:27:29,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:27:29,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:27:29,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:27:29,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:27:29,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:29,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:27:29,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:27:29,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:27:29,835 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:27:29,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:27:29,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:27:29,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:27:29,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:27:29,837 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_f9410ede-c524-4a55-9fca-7b0b50b9105b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f742293e1d7618171cf3a543c4629a6bee745f5c0d4fe8b828e91b8996c2b07 [2021-11-13 01:27:30,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:27:30,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:27:30,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:27:30,175 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:27:30,176 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:27:30,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-13 01:27:30,282 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/data/0797b0076/b6dd6ccddd964c159fb814c1165a0f3e/FLAGaa96159b7 [2021-11-13 01:27:30,941 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:27:30,942 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-13 01:27:30,955 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/data/0797b0076/b6dd6ccddd964c159fb814c1165a0f3e/FLAGaa96159b7 [2021-11-13 01:27:31,270 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/data/0797b0076/b6dd6ccddd964c159fb814c1165a0f3e [2021-11-13 01:27:31,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:27:31,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:27:31,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:31,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:27:31,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:27:31,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:31" (1/1) ... [2021-11-13 01:27:31,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@285ad743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:31, skipping insertion in model container [2021-11-13 01:27:31,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:31" (1/1) ... [2021-11-13 01:27:31,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:27:31,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:27:31,757 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_f9410ede-c524-4a55-9fca-7b0b50b9105b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7233,7246] [2021-11-13 01:27:31,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:31,859 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:27:31,956 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_f9410ede-c524-4a55-9fca-7b0b50b9105b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7233,7246] [2021-11-13 01:27:31,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:32,004 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:27:32,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32 WrapperNode [2021-11-13 01:27:32,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:32,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:27:32,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:27:32,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:27:32,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32" (1/1) ... [2021-11-13 01:27:32,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32" (1/1) ... [2021-11-13 01:27:32,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:27:32,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:27:32,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:27:32,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:27:32,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32" (1/1) ... [2021-11-13 01:27:32,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32" (1/1) ... [2021-11-13 01:27:32,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32" (1/1) ... [2021-11-13 01:27:32,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32" (1/1) ... [2021-11-13 01:27:32,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32" (1/1) ... [2021-11-13 01:27:32,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32" (1/1) ... [2021-11-13 01:27:32,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32" (1/1) ... [2021-11-13 01:27:32,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:27:32,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:27:32,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:27:32,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:27:32,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32" (1/1) ... [2021-11-13 01:27:32,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:32,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:32,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:27:32,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:27:32,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 01:27:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:27:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:27:32,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:27:33,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:27:33,396 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 01:27:33,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:27:33 BoogieIcfgContainer [2021-11-13 01:27:33,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:27:33,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:27:33,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:27:33,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:27:33,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:27:31" (1/3) ... [2021-11-13 01:27:33,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d67de10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:27:33, skipping insertion in model container [2021-11-13 01:27:33,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:32" (2/3) ... [2021-11-13 01:27:33,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d67de10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:27:33, skipping insertion in model container [2021-11-13 01:27:33,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:27:33" (3/3) ... [2021-11-13 01:27:33,430 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-13 01:27:33,436 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:27:33,437 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:27:33,496 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:27:33,505 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 [2021-11-13 01:27:33,505 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:27:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 1.7647058823529411) internal successors, (150), 86 states have internal predecessors, (150), 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) [2021-11-13 01:27:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 01:27:33,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:33,536 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] [2021-11-13 01:27:33,537 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:33,545 INFO L85 PathProgramCache]: Analyzing trace with hash 223748202, now seen corresponding path program 1 times [2021-11-13 01:27:33,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:33,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288349763] [2021-11-13 01:27:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:33,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:33,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:33,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288349763] [2021-11-13 01:27:33,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288349763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:33,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:33,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:27:33,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130995184] [2021-11-13 01:27:33,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:33,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:27:33,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:34,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:27:34,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:27:34,023 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 1.7647058823529411) internal successors, (150), 86 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-11-13 01:27:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:34,150 INFO L93 Difference]: Finished difference Result 191 states and 317 transitions. [2021-11-13 01:27:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:27:34,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2021-11-13 01:27:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:34,168 INFO L225 Difference]: With dead ends: 191 [2021-11-13 01:27:34,168 INFO L226 Difference]: Without dead ends: 129 [2021-11-13 01:27:34,172 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 [2021-11-13 01:27:34,177 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 92 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.92ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:34,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 322 Invalid, 20 Unknown, 0 Unchecked, 6.26ms Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 70.92ms Time] [2021-11-13 01:27:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-13 01:27:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2021-11-13 01:27:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.492063492063492) internal successors, (188), 126 states have internal predecessors, (188), 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) [2021-11-13 01:27:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 188 transitions. [2021-11-13 01:27:34,239 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 188 transitions. Word has length 38 [2021-11-13 01:27:34,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:34,239 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 188 transitions. [2021-11-13 01:27:34,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-11-13 01:27:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 188 transitions. [2021-11-13 01:27:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 01:27:34,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:34,243 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] [2021-11-13 01:27:34,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 01:27:34,244 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash -679526618, now seen corresponding path program 1 times [2021-11-13 01:27:34,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:34,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229158844] [2021-11-13 01:27:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:34,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:34,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:34,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229158844] [2021-11-13 01:27:34,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229158844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:34,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:34,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:27:34,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118419258] [2021-11-13 01:27:34,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:34,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:27:34,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:34,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:27:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:27:34,425 INFO L87 Difference]: Start difference. First operand 127 states and 188 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:34,567 INFO L93 Difference]: Finished difference Result 282 states and 437 transitions. [2021-11-13 01:27:34,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:27:34,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-13 01:27:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:34,571 INFO L225 Difference]: With dead ends: 282 [2021-11-13 01:27:34,572 INFO L226 Difference]: Without dead ends: 184 [2021-11-13 01:27:34,573 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 [2021-11-13 01:27:34,575 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 81 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.99ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:34,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 194 Invalid, 25 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 101.99ms Time] [2021-11-13 01:27:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-13 01:27:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2021-11-13 01:27:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5082872928176796) internal successors, (273), 181 states have internal predecessors, (273), 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) [2021-11-13 01:27:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 273 transitions. [2021-11-13 01:27:34,605 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 273 transitions. Word has length 40 [2021-11-13 01:27:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:34,606 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 273 transitions. [2021-11-13 01:27:34,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 273 transitions. [2021-11-13 01:27:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 01:27:34,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:34,610 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] [2021-11-13 01:27:34,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 01:27:34,610 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:34,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:34,612 INFO L85 PathProgramCache]: Analyzing trace with hash 128704147, now seen corresponding path program 1 times [2021-11-13 01:27:34,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:34,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964652666] [2021-11-13 01:27:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:34,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:34,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:34,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964652666] [2021-11-13 01:27:34,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964652666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:34,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:34,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:27:34,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471516386] [2021-11-13 01:27:34,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:34,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:27:34,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:27:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:27:34,735 INFO L87 Difference]: Start difference. First operand 182 states and 273 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2021-11-13 01:27:34,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:34,869 INFO L93 Difference]: Finished difference Result 448 states and 700 transitions. [2021-11-13 01:27:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:27:34,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2021-11-13 01:27:34,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:34,876 INFO L225 Difference]: With dead ends: 448 [2021-11-13 01:27:34,876 INFO L226 Difference]: Without dead ends: 297 [2021-11-13 01:27:34,877 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 [2021-11-13 01:27:34,884 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 82 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.40ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:34,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 244 Invalid, 16 Unknown, 0 Unchecked, 4.51ms Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 45.40ms Time] [2021-11-13 01:27:34,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-13 01:27:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2021-11-13 01:27:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.5442176870748299) internal successors, (454), 294 states have internal predecessors, (454), 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) [2021-11-13 01:27:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 454 transitions. [2021-11-13 01:27:34,950 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 454 transitions. Word has length 42 [2021-11-13 01:27:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:34,951 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 454 transitions. [2021-11-13 01:27:34,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2021-11-13 01:27:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 454 transitions. [2021-11-13 01:27:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 01:27:34,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:34,961 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] [2021-11-13 01:27:34,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 01:27:34,961 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:34,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:34,962 INFO L85 PathProgramCache]: Analyzing trace with hash -725243457, now seen corresponding path program 1 times [2021-11-13 01:27:34,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:34,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744360422] [2021-11-13 01:27:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:34,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:35,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:35,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744360422] [2021-11-13 01:27:35,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744360422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:35,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:35,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:27:35,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056802130] [2021-11-13 01:27:35,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:35,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:27:35,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:35,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:27:35,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:27:35,051 INFO L87 Difference]: Start difference. First operand 295 states and 454 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:35,146 INFO L93 Difference]: Finished difference Result 723 states and 1138 transitions. [2021-11-13 01:27:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:27:35,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-13 01:27:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:35,151 INFO L225 Difference]: With dead ends: 723 [2021-11-13 01:27:35,152 INFO L226 Difference]: Without dead ends: 459 [2021-11-13 01:27:35,154 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 [2021-11-13 01:27:35,156 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 81 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.20ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.55ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:35,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 210 Invalid, 13 Unknown, 0 Unchecked, 6.20ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 48.55ms Time] [2021-11-13 01:27:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-13 01:27:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2021-11-13 01:27:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.5592105263157894) internal successors, (711), 456 states have internal predecessors, (711), 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) [2021-11-13 01:27:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 711 transitions. [2021-11-13 01:27:35,204 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 711 transitions. Word has length 44 [2021-11-13 01:27:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:35,205 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 711 transitions. [2021-11-13 01:27:35,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 711 transitions. [2021-11-13 01:27:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 01:27:35,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:35,207 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] [2021-11-13 01:27:35,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 01:27:35,208 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:35,209 INFO L85 PathProgramCache]: Analyzing trace with hash -448509902, now seen corresponding path program 1 times [2021-11-13 01:27:35,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:35,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841133224] [2021-11-13 01:27:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:35,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:35,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:35,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841133224] [2021-11-13 01:27:35,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841133224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:35,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:35,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:27:35,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964477027] [2021-11-13 01:27:35,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:35,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:27:35,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:35,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:27:35,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:27:35,313 INFO L87 Difference]: Start difference. First operand 457 states and 711 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:35,425 INFO L93 Difference]: Finished difference Result 1175 states and 1862 transitions. [2021-11-13 01:27:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:27:35,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-13 01:27:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:35,433 INFO L225 Difference]: With dead ends: 1175 [2021-11-13 01:27:35,434 INFO L226 Difference]: Without dead ends: 762 [2021-11-13 01:27:35,436 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 [2021-11-13 01:27:35,447 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 77 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.11ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:35,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 225 Invalid, 16 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 63.11ms Time] [2021-11-13 01:27:35,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-11-13 01:27:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 760. [2021-11-13 01:27:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 1.5691699604743083) internal successors, (1191), 759 states have internal predecessors, (1191), 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) [2021-11-13 01:27:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1191 transitions. [2021-11-13 01:27:35,558 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1191 transitions. Word has length 46 [2021-11-13 01:27:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:35,562 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 1191 transitions. [2021-11-13 01:27:35,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1191 transitions. [2021-11-13 01:27:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 01:27:35,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:35,568 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] [2021-11-13 01:27:35,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 01:27:35,569 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:35,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:35,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1743853951, now seen corresponding path program 1 times [2021-11-13 01:27:35,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:35,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360010716] [2021-11-13 01:27:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:35,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:35,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:35,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360010716] [2021-11-13 01:27:35,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360010716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:35,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:35,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:27:35,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718470607] [2021-11-13 01:27:35,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:35,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:27:35,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:35,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:27:35,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:27:35,725 INFO L87 Difference]: Start difference. First operand 760 states and 1191 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-11-13 01:27:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:35,928 INFO L93 Difference]: Finished difference Result 1902 states and 3012 transitions. [2021-11-13 01:27:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:27:35,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2021-11-13 01:27:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:35,969 INFO L225 Difference]: With dead ends: 1902 [2021-11-13 01:27:35,969 INFO L226 Difference]: Without dead ends: 1186 [2021-11-13 01:27:35,971 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 [2021-11-13 01:27:35,973 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 76 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.85ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:35,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 212 Invalid, 13 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 83.85ms Time] [2021-11-13 01:27:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-11-13 01:27:36,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1184. [2021-11-13 01:27:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.5731191885038038) internal successors, (1861), 1183 states have internal predecessors, (1861), 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) [2021-11-13 01:27:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1861 transitions. [2021-11-13 01:27:36,082 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1861 transitions. Word has length 48 [2021-11-13 01:27:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:36,083 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 1861 transitions. [2021-11-13 01:27:36,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-11-13 01:27:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1861 transitions. [2021-11-13 01:27:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 01:27:36,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:36,089 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] [2021-11-13 01:27:36,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 01:27:36,090 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:36,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:36,091 INFO L85 PathProgramCache]: Analyzing trace with hash -496972498, now seen corresponding path program 1 times [2021-11-13 01:27:36,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:36,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134332312] [2021-11-13 01:27:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:36,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:36,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:36,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134332312] [2021-11-13 01:27:36,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134332312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:36,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:36,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 01:27:36,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330571006] [2021-11-13 01:27:36,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:36,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:27:36,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:36,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:27:36,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:27:36,225 INFO L87 Difference]: Start difference. First operand 1184 states and 1861 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:36,623 INFO L93 Difference]: Finished difference Result 3012 states and 4750 transitions. [2021-11-13 01:27:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:27:36,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-13 01:27:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:36,640 INFO L225 Difference]: With dead ends: 3012 [2021-11-13 01:27:36,640 INFO L226 Difference]: Without dead ends: 1885 [2021-11-13 01:27:36,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:27:36,645 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 460 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.19ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.67ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:36,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 816 Invalid, 139 Unknown, 0 Unchecked, 5.19ms Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 206.67ms Time] [2021-11-13 01:27:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-11-13 01:27:36,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1875. [2021-11-13 01:27:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5618996798292422) internal successors, (2927), 1874 states have internal predecessors, (2927), 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) [2021-11-13 01:27:36,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2927 transitions. [2021-11-13 01:27:36,796 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2927 transitions. Word has length 50 [2021-11-13 01:27:36,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:36,796 INFO L470 AbstractCegarLoop]: Abstraction has 1875 states and 2927 transitions. [2021-11-13 01:27:36,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2927 transitions. [2021-11-13 01:27:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 01:27:36,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:36,798 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] [2021-11-13 01:27:36,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 01:27:36,799 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:36,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:36,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1711217546, now seen corresponding path program 1 times [2021-11-13 01:27:36,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:36,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108770935] [2021-11-13 01:27:36,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:36,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:36,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:36,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108770935] [2021-11-13 01:27:36,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108770935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:36,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:36,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:27:36,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873726342] [2021-11-13 01:27:36,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:36,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:27:36,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:27:36,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:27:36,864 INFO L87 Difference]: Start difference. First operand 1875 states and 2927 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:37,097 INFO L93 Difference]: Finished difference Result 3695 states and 5786 transitions. [2021-11-13 01:27:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:27:37,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-13 01:27:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:37,112 INFO L225 Difference]: With dead ends: 3695 [2021-11-13 01:27:37,112 INFO L226 Difference]: Without dead ends: 1877 [2021-11-13 01:27:37,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:27:37,120 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 153 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:37,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 302 Invalid, 43 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 70.00ms Time] [2021-11-13 01:27:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-11-13 01:27:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2021-11-13 01:27:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.555496264674493) internal successors, (2915), 1874 states have internal predecessors, (2915), 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) [2021-11-13 01:27:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2915 transitions. [2021-11-13 01:27:37,294 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2915 transitions. Word has length 51 [2021-11-13 01:27:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:37,298 INFO L470 AbstractCegarLoop]: Abstraction has 1875 states and 2915 transitions. [2021-11-13 01:27:37,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2915 transitions. [2021-11-13 01:27:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 01:27:37,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:37,301 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] [2021-11-13 01:27:37,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 01:27:37,302 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:37,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1450190197, now seen corresponding path program 1 times [2021-11-13 01:27:37,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:37,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796680558] [2021-11-13 01:27:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:37,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:37,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:37,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796680558] [2021-11-13 01:27:37,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796680558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:37,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:37,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:27:37,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427297990] [2021-11-13 01:27:37,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:37,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:27:37,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:37,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:27:37,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:27:37,413 INFO L87 Difference]: Start difference. First operand 1875 states and 2915 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-13 01:27:37,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:37,620 INFO L93 Difference]: Finished difference Result 3695 states and 5762 transitions. [2021-11-13 01:27:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:27:37,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 52 [2021-11-13 01:27:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:37,635 INFO L225 Difference]: With dead ends: 3695 [2021-11-13 01:27:37,636 INFO L226 Difference]: Without dead ends: 1877 [2021-11-13 01:27:37,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:27:37,644 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 161 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.85ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:37,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 308 Invalid, 44 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 64.85ms Time] [2021-11-13 01:27:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-11-13 01:27:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2021-11-13 01:27:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5490928495197438) internal successors, (2903), 1874 states have internal predecessors, (2903), 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) [2021-11-13 01:27:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2903 transitions. [2021-11-13 01:27:37,818 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2903 transitions. Word has length 52 [2021-11-13 01:27:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:37,818 INFO L470 AbstractCegarLoop]: Abstraction has 1875 states and 2903 transitions. [2021-11-13 01:27:37,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-13 01:27:37,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2903 transitions. [2021-11-13 01:27:37,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-13 01:27:37,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:37,820 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] [2021-11-13 01:27:37,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 01:27:37,820 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:37,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1952834993, now seen corresponding path program 1 times [2021-11-13 01:27:37,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:37,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869591844] [2021-11-13 01:27:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:37,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:37,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:37,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869591844] [2021-11-13 01:27:37,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869591844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:37,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:37,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:27:37,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569017562] [2021-11-13 01:27:37,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:37,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:27:37,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:37,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:27:37,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:27:37,888 INFO L87 Difference]: Start difference. First operand 1875 states and 2903 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-13 01:27:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:38,108 INFO L93 Difference]: Finished difference Result 3695 states and 5738 transitions. [2021-11-13 01:27:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:27:38,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-11-13 01:27:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:38,122 INFO L225 Difference]: With dead ends: 3695 [2021-11-13 01:27:38,123 INFO L226 Difference]: Without dead ends: 1877 [2021-11-13 01:27:38,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:27:38,127 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 159 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.16ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:38,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 311 Invalid, 43 Unknown, 0 Unchecked, 1.72ms Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 66.16ms Time] [2021-11-13 01:27:38,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-11-13 01:27:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2021-11-13 01:27:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5426894343649946) internal successors, (2891), 1874 states have internal predecessors, (2891), 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) [2021-11-13 01:27:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2891 transitions. [2021-11-13 01:27:38,332 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2891 transitions. Word has length 53 [2021-11-13 01:27:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:38,334 INFO L470 AbstractCegarLoop]: Abstraction has 1875 states and 2891 transitions. [2021-11-13 01:27:38,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-13 01:27:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2891 transitions. [2021-11-13 01:27:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 01:27:38,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:38,336 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] [2021-11-13 01:27:38,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 01:27:38,337 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:38,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1743591742, now seen corresponding path program 1 times [2021-11-13 01:27:38,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:38,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374028602] [2021-11-13 01:27:38,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:38,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:38,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:38,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374028602] [2021-11-13 01:27:38,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374028602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:38,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:38,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 01:27:38,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012033932] [2021-11-13 01:27:38,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:38,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:27:38,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:38,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:27:38,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:27:38,503 INFO L87 Difference]: Start difference. First operand 1875 states and 2891 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-13 01:27:38,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:38,759 INFO L93 Difference]: Finished difference Result 3695 states and 5714 transitions. [2021-11-13 01:27:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:27:38,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 55 [2021-11-13 01:27:38,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:38,774 INFO L225 Difference]: With dead ends: 3695 [2021-11-13 01:27:38,774 INFO L226 Difference]: Without dead ends: 1877 [2021-11-13 01:27:38,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:27:38,779 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 185 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.41ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:38,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 297 Invalid, 58 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 81.41ms Time] [2021-11-13 01:27:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-11-13 01:27:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2021-11-13 01:27:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.538420490928495) internal successors, (2883), 1874 states have internal predecessors, (2883), 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) [2021-11-13 01:27:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2883 transitions. [2021-11-13 01:27:38,966 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2883 transitions. Word has length 55 [2021-11-13 01:27:38,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:38,967 INFO L470 AbstractCegarLoop]: Abstraction has 1875 states and 2883 transitions. [2021-11-13 01:27:38,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-13 01:27:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2883 transitions. [2021-11-13 01:27:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 01:27:38,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:38,968 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] [2021-11-13 01:27:38,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 01:27:38,969 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:38,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2055668249, now seen corresponding path program 1 times [2021-11-13 01:27:38,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:38,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48344682] [2021-11-13 01:27:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:38,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:39,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:39,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48344682] [2021-11-13 01:27:39,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48344682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:39,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:39,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 01:27:39,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685575573] [2021-11-13 01:27:39,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:39,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:27:39,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:39,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:27:39,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:27:39,091 INFO L87 Difference]: Start difference. First operand 1875 states and 2883 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:39,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:39,425 INFO L93 Difference]: Finished difference Result 4716 states and 7241 transitions. [2021-11-13 01:27:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:27:39,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-13 01:27:39,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:39,446 INFO L225 Difference]: With dead ends: 4716 [2021-11-13 01:27:39,447 INFO L226 Difference]: Without dead ends: 2898 [2021-11-13 01:27:39,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:27:39,452 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 244 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.00ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.02ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:39,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 316 Invalid, 49 Unknown, 0 Unchecked, 2.00ms Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 76.02ms Time] [2021-11-13 01:27:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-11-13 01:27:39,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2896. [2021-11-13 01:27:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 1.5246977547495681) internal successors, (4414), 2895 states have internal predecessors, (4414), 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) [2021-11-13 01:27:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4414 transitions. [2021-11-13 01:27:39,722 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4414 transitions. Word has length 58 [2021-11-13 01:27:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:39,723 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 4414 transitions. [2021-11-13 01:27:39,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4414 transitions. [2021-11-13 01:27:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 01:27:39,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:39,724 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] [2021-11-13 01:27:39,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 01:27:39,725 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:39,726 INFO L85 PathProgramCache]: Analyzing trace with hash 709545590, now seen corresponding path program 1 times [2021-11-13 01:27:39,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:39,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652690202] [2021-11-13 01:27:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:39,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:39,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:39,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652690202] [2021-11-13 01:27:39,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652690202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:39,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:39,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 01:27:39,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143605760] [2021-11-13 01:27:39,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:39,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:27:39,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:39,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:27:39,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:27:39,854 INFO L87 Difference]: Start difference. First operand 2896 states and 4414 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-13 01:27:40,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:40,309 INFO L93 Difference]: Finished difference Result 3555 states and 5390 transitions. [2021-11-13 01:27:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:27:40,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 59 [2021-11-13 01:27:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:40,335 INFO L225 Difference]: With dead ends: 3555 [2021-11-13 01:27:40,336 INFO L226 Difference]: Without dead ends: 3553 [2021-11-13 01:27:40,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:27:40,338 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 216 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.66ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.57ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:40,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 711 Invalid, 105 Unknown, 0 Unchecked, 3.66ms Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 138.57ms Time] [2021-11-13 01:27:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-11-13 01:27:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2902. [2021-11-13 01:27:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 1.5215442950706652) internal successors, (4414), 2901 states have internal predecessors, (4414), 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) [2021-11-13 01:27:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 4414 transitions. [2021-11-13 01:27:40,657 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 4414 transitions. Word has length 59 [2021-11-13 01:27:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:40,658 INFO L470 AbstractCegarLoop]: Abstraction has 2902 states and 4414 transitions. [2021-11-13 01:27:40,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-13 01:27:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 4414 transitions. [2021-11-13 01:27:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 01:27:40,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:40,664 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:27:40,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 01:27:40,664 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1768604799, now seen corresponding path program 1 times [2021-11-13 01:27:40,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:40,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871578614] [2021-11-13 01:27:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:40,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:27:41,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:41,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871578614] [2021-11-13 01:27:41,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871578614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:41,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953674915] [2021-11-13 01:27:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:41,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:41,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:41,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:27:41,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 01:27:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:41,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 01:27:41,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:27:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 01:27:42,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:27:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 01:27:43,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953674915] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:43,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:27:43,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 6] total 16 [2021-11-13 01:27:43,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514847498] [2021-11-13 01:27:43,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:43,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:27:43,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:43,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:27:43,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:27:43,391 INFO L87 Difference]: Start difference. First operand 2902 states and 4414 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:44,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:44,228 INFO L93 Difference]: Finished difference Result 8379 states and 12782 transitions. [2021-11-13 01:27:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:27:44,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-13 01:27:44,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:44,289 INFO L225 Difference]: With dead ends: 8379 [2021-11-13 01:27:44,293 INFO L226 Difference]: Without dead ends: 5519 [2021-11-13 01:27:44,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:27:44,302 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 428 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.34ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.60ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:44,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 221 Invalid, 21 Unknown, 0 Unchecked, 2.34ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 50.60ms Time] [2021-11-13 01:27:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5519 states. [2021-11-13 01:27:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5519 to 5517. [2021-11-13 01:27:45,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 5516 states have (on average 1.5143219724438) internal successors, (8353), 5516 states have internal predecessors, (8353), 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) [2021-11-13 01:27:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 8353 transitions. [2021-11-13 01:27:45,096 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 8353 transitions. Word has length 67 [2021-11-13 01:27:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:45,097 INFO L470 AbstractCegarLoop]: Abstraction has 5517 states and 8353 transitions. [2021-11-13 01:27:45,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:27:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 8353 transitions. [2021-11-13 01:27:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 01:27:45,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:45,099 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:27:45,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:27:45,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:45,315 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:45,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:45,316 INFO L85 PathProgramCache]: Analyzing trace with hash 318928394, now seen corresponding path program 1 times [2021-11-13 01:27:45,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:45,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418374404] [2021-11-13 01:27:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:45,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 01:27:45,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:45,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418374404] [2021-11-13 01:27:45,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418374404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:45,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:45,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:27:45,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678598987] [2021-11-13 01:27:45,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:45,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:27:45,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:45,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:27:45,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:27:45,453 INFO L87 Difference]: Start difference. First operand 5517 states and 8353 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-13 01:27:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:46,291 INFO L93 Difference]: Finished difference Result 10998 states and 16667 transitions. [2021-11-13 01:27:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:27:46,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 70 [2021-11-13 01:27:46,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:46,307 INFO L225 Difference]: With dead ends: 10998 [2021-11-13 01:27:46,308 INFO L226 Difference]: Without dead ends: 5517 [2021-11-13 01:27:46,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:27:46,318 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 294 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.71ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:46,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 103 Invalid, 38 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 80.71ms Time] [2021-11-13 01:27:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5517 states. [2021-11-13 01:27:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5517 to 5517. [2021-11-13 01:27:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 5516 states have (on average 1.4807831762146484) internal successors, (8168), 5516 states have internal predecessors, (8168), 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) [2021-11-13 01:27:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 8168 transitions. [2021-11-13 01:27:47,010 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 8168 transitions. Word has length 70 [2021-11-13 01:27:47,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:47,010 INFO L470 AbstractCegarLoop]: Abstraction has 5517 states and 8168 transitions. [2021-11-13 01:27:47,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-13 01:27:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 8168 transitions. [2021-11-13 01:27:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 01:27:47,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:47,012 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:27:47,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 01:27:47,013 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:47,014 INFO L85 PathProgramCache]: Analyzing trace with hash -184116433, now seen corresponding path program 1 times [2021-11-13 01:27:47,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:47,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916116144] [2021-11-13 01:27:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:47,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:27:48,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:48,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916116144] [2021-11-13 01:27:48,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916116144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:48,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436753939] [2021-11-13 01:27:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:48,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:48,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:48,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:27:48,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 01:27:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:48,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 01:27:48,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:27:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:27:49,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:27:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 01:27:49,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436753939] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:49,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:27:49,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 6] total 16 [2021-11-13 01:27:49,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022184100] [2021-11-13 01:27:49,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:49,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:27:49,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:49,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:27:49,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:27:49,925 INFO L87 Difference]: Start difference. First operand 5517 states and 8168 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-13 01:27:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:51,237 INFO L93 Difference]: Finished difference Result 16047 states and 23786 transitions. [2021-11-13 01:27:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:27:51,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 70 [2021-11-13 01:27:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:51,322 INFO L225 Difference]: With dead ends: 16047 [2021-11-13 01:27:51,322 INFO L226 Difference]: Without dead ends: 10599 [2021-11-13 01:27:51,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:27:51,333 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 314 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.88ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:51,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 245 Invalid, 22 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 40.88ms Time] [2021-11-13 01:27:51,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10599 states. [2021-11-13 01:27:52,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10599 to 10597. [2021-11-13 01:27:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10597 states, 10596 states have (on average 1.4730086825217064) internal successors, (15608), 10596 states have internal predecessors, (15608), 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) [2021-11-13 01:27:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 15608 transitions. [2021-11-13 01:27:52,403 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 15608 transitions. Word has length 70 [2021-11-13 01:27:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:52,404 INFO L470 AbstractCegarLoop]: Abstraction has 10597 states and 15608 transitions. [2021-11-13 01:27:52,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-13 01:27:52,404 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 15608 transitions. [2021-11-13 01:27:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 01:27:52,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:52,406 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:27:52,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-13 01:27:52,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 01:27:52,628 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:52,628 INFO L85 PathProgramCache]: Analyzing trace with hash 886657518, now seen corresponding path program 1 times [2021-11-13 01:27:52,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:52,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542511739] [2021-11-13 01:27:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:52,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:27:52,720 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:52,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542511739] [2021-11-13 01:27:52,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542511739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:52,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:52,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:27:52,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167108748] [2021-11-13 01:27:52,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:52,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:27:52,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:52,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:27:52,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:27:52,724 INFO L87 Difference]: Start difference. First operand 10597 states and 15608 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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) [2021-11-13 01:27:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:54,237 INFO L93 Difference]: Finished difference Result 21137 states and 31149 transitions. [2021-11-13 01:27:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:27:54,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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 73 [2021-11-13 01:27:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:54,271 INFO L225 Difference]: With dead ends: 21137 [2021-11-13 01:27:54,272 INFO L226 Difference]: Without dead ends: 10597 [2021-11-13 01:27:54,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:27:54,287 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 278 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.02ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:54,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 105 Invalid, 36 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 47.02ms Time] [2021-11-13 01:27:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10597 states. [2021-11-13 01:27:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10597 to 10597. [2021-11-13 01:27:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10597 states, 10596 states have (on average 1.446583616459041) internal successors, (15328), 10596 states have internal predecessors, (15328), 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) [2021-11-13 01:27:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 15328 transitions. [2021-11-13 01:27:55,511 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 15328 transitions. Word has length 73 [2021-11-13 01:27:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:55,512 INFO L470 AbstractCegarLoop]: Abstraction has 10597 states and 15328 transitions. [2021-11-13 01:27:55,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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) [2021-11-13 01:27:55,512 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 15328 transitions. [2021-11-13 01:27:55,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 01:27:55,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:55,515 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:27:55,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 01:27:55,515 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 530696617, now seen corresponding path program 1 times [2021-11-13 01:27:55,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:55,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270289181] [2021-11-13 01:27:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:55,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:27:56,125 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:56,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270289181] [2021-11-13 01:27:56,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270289181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:56,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746246728] [2021-11-13 01:27:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:56,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:56,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:56,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:27:56,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 01:27:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:56,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 01:27:56,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:27:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 01:27:57,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:27:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:27:57,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746246728] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:57,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:27:57,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 6] total 16 [2021-11-13 01:27:57,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737737896] [2021-11-13 01:27:57,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:57,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:27:57,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:57,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:27:57,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:27:57,799 INFO L87 Difference]: Start difference. First operand 10597 states and 15328 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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) [2021-11-13 01:28:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:00,614 INFO L93 Difference]: Finished difference Result 31057 states and 44938 transitions. [2021-11-13 01:28:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:28:00,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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 73 [2021-11-13 01:28:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:00,669 INFO L225 Difference]: With dead ends: 31057 [2021-11-13 01:28:00,670 INFO L226 Difference]: Without dead ends: 20539 [2021-11-13 01:28:00,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:28:00,692 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 246 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.39ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:00,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 289 Invalid, 26 Unknown, 0 Unchecked, 1.97ms Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 42.39ms Time] [2021-11-13 01:28:00,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20539 states. [2021-11-13 01:28:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20539 to 20537. [2021-11-13 01:28:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20537 states, 20536 states have (on average 1.4392286716010907) internal successors, (29556), 20536 states have internal predecessors, (29556), 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) [2021-11-13 01:28:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20537 states to 20537 states and 29556 transitions. [2021-11-13 01:28:03,425 INFO L78 Accepts]: Start accepts. Automaton has 20537 states and 29556 transitions. Word has length 73 [2021-11-13 01:28:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:03,425 INFO L470 AbstractCegarLoop]: Abstraction has 20537 states and 29556 transitions. [2021-11-13 01:28:03,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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) [2021-11-13 01:28:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 20537 states and 29556 transitions. [2021-11-13 01:28:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 01:28:03,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:03,429 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-13 01:28:03,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:03,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 01:28:03,655 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1012531897, now seen corresponding path program 1 times [2021-11-13 01:28:03,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:28:03,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305785703] [2021-11-13 01:28:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:03,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:28:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:28:04,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:28:04,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305785703] [2021-11-13 01:28:04,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305785703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:28:04,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089676755] [2021-11-13 01:28:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:04,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:28:04,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:28:04,907 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:28:04,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 01:28:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:05,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 01:28:05,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 01:28:06,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:28:06,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089676755] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:28:06,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:28:06,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7] total 19 [2021-11-13 01:28:06,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799426699] [2021-11-13 01:28:06,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:06,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:28:06,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:28:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:28:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:28:06,899 INFO L87 Difference]: Start difference. First operand 20537 states and 29556 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-11-13 01:28:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:10,674 INFO L93 Difference]: Finished difference Result 39711 states and 56806 transitions. [2021-11-13 01:28:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:28:10,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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 76 [2021-11-13 01:28:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:10,746 INFO L225 Difference]: With dead ends: 39711 [2021-11-13 01:28:10,746 INFO L226 Difference]: Without dead ends: 28993 [2021-11-13 01:28:10,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-11-13 01:28:10,773 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 546 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.44ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.10ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:10,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 290 Invalid, 35 Unknown, 0 Unchecked, 3.44ms Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 53.10ms Time] [2021-11-13 01:28:10,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28993 states. [2021-11-13 01:28:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28993 to 20559. [2021-11-13 01:28:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20559 states, 20558 states have (on average 1.4390018484288354) internal successors, (29583), 20558 states have internal predecessors, (29583), 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) [2021-11-13 01:28:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 29583 transitions. [2021-11-13 01:28:13,934 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 29583 transitions. Word has length 76 [2021-11-13 01:28:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:13,934 INFO L470 AbstractCegarLoop]: Abstraction has 20559 states and 29583 transitions. [2021-11-13 01:28:13,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-11-13 01:28:13,934 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 29583 transitions. [2021-11-13 01:28:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 01:28:13,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:13,937 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-13 01:28:13,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:14,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:28:14,139 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1639058183, now seen corresponding path program 1 times [2021-11-13 01:28:14,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:28:14,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004562325] [2021-11-13 01:28:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:14,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:28:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:28:15,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:28:15,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004562325] [2021-11-13 01:28:15,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004562325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:28:15,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711001001] [2021-11-13 01:28:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:15,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:28:15,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:28:15,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:28:15,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 01:28:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:16,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 01:28:16,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 01:28:17,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:28:18,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711001001] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:28:18,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:28:18,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7] total 19 [2021-11-13 01:28:18,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687793953] [2021-11-13 01:28:18,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:18,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:28:18,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:28:18,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:28:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:28:18,052 INFO L87 Difference]: Start difference. First operand 20559 states and 29583 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-11-13 01:28:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:23,211 INFO L93 Difference]: Finished difference Result 48663 states and 69901 transitions. [2021-11-13 01:28:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:28:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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 76 [2021-11-13 01:28:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:23,289 INFO L225 Difference]: With dead ends: 48663 [2021-11-13 01:28:23,289 INFO L226 Difference]: Without dead ends: 38145 [2021-11-13 01:28:23,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-11-13 01:28:23,306 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 352 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.42ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.13ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:23,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 440 Invalid, 49 Unknown, 0 Unchecked, 3.42ms Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 65.13ms Time] [2021-11-13 01:28:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38145 states. [2021-11-13 01:28:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38145 to 30525. [2021-11-13 01:28:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30525 states, 30524 states have (on average 1.426942733586686) internal successors, (43556), 30524 states have internal predecessors, (43556), 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) [2021-11-13 01:28:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30525 states to 30525 states and 43556 transitions. [2021-11-13 01:28:27,633 INFO L78 Accepts]: Start accepts. Automaton has 30525 states and 43556 transitions. Word has length 76 [2021-11-13 01:28:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:27,633 INFO L470 AbstractCegarLoop]: Abstraction has 30525 states and 43556 transitions. [2021-11-13 01:28:27,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-11-13 01:28:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 30525 states and 43556 transitions. [2021-11-13 01:28:27,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 01:28:27,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:27,636 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-13 01:28:27,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-13 01:28:27,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:28:27,851 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1006096199, now seen corresponding path program 1 times [2021-11-13 01:28:27,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:28:27,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501000650] [2021-11-13 01:28:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:27,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:28:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:28:29,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:28:29,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501000650] [2021-11-13 01:28:29,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501000650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:28:29,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278748777] [2021-11-13 01:28:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:29,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:28:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:28:29,189 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:28:29,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9410ede-c524-4a55-9fca-7b0b50b9105b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 01:28:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:29,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 01:28:29,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 01:28:30,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:37,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278748777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:28:37,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1963163819] [2021-11-13 01:28:37,413 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2021-11-13 01:28:37,413 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:28:37,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 01:28:37,425 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 01:28:37,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 01:28:37,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:28:37,904 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:28:37,905 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:28:37,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:28:37,906 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:28:37,906 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:28:37,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:28:37,907 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:28:37,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:28:37,913 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 01:28:37,915 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 01:28:37,922 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:28:37,923 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 01:28:37,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 799 [2021-11-13 01:28:37,954 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2021-11-13 01:28:55,499 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 262144 conjuctions. This might take some time...