./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs --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 d0919f37d9ec3b35ef959618459b2f9ff909696f753b572bc67b87ebda7b05b0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:01:41,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:01:41,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:01:42,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:01:42,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:01:42,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:01:42,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:01:42,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:01:42,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:01:42,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:01:42,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:01:42,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:01:42,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:01:42,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:01:42,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:01:42,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:01:42,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:01:42,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:01:42,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:01:42,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:01:42,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:01:42,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:01:42,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:01:42,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:01:42,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:01:42,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:01:42,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:01:42,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:01:42,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:01:42,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:01:42,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:01:42,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:01:42,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:01:42,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:01:42,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:01:42,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:01:42,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:01:42,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:01:42,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:01:42,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:01:42,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:01:42,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:01:42,103 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:01:42,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:01:42,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:01:42,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:01:42,105 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:01:42,105 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:01:42,105 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:01:42,106 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:01:42,106 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:01:42,106 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:01:42,106 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:01:42,107 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:01:42,107 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:01:42,107 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:01:42,107 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:01:42,108 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:01:42,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:01:42,109 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:01:42,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:01:42,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:01:42,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:01:42,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:01:42,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:01:42,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:01:42,110 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:01:42,110 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:01:42,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:01:42,111 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:01:42,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:01:42,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:01:42,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:01:42,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:01:42,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:01:42,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:01:42,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:01:42,113 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:01:42,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:01:42,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:01:42,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:01:42,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:01:42,114 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_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0919f37d9ec3b35ef959618459b2f9ff909696f753b572bc67b87ebda7b05b0 [2021-11-19 14:01:42,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:01:42,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:01:42,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:01:42,417 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:01:42,418 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:01:42,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2021-11-19 14:01:42,498 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/data/cd1059015/5c3fb8d8fc6245bc8f4288d10d830b10/FLAGf76e70153 [2021-11-19 14:01:43,048 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:01:43,049 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2021-11-19 14:01:43,065 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/data/cd1059015/5c3fb8d8fc6245bc8f4288d10d830b10/FLAGf76e70153 [2021-11-19 14:01:43,392 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/data/cd1059015/5c3fb8d8fc6245bc8f4288d10d830b10 [2021-11-19 14:01:43,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:01:43,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:01:43,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:43,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:01:43,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:01:43,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:43,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716854ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43, skipping insertion in model container [2021-11-19 14:01:43,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:43,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:01:43,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:01:43,784 WARN L230 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_c4d71e7e-9763-4324-9454-93ef1cb03850/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c[24198,24211] [2021-11-19 14:01:43,786 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:43,797 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:01:43,952 WARN L230 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_c4d71e7e-9763-4324-9454-93ef1cb03850/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c[24198,24211] [2021-11-19 14:01:43,956 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:43,985 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:01:43,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43 WrapperNode [2021-11-19 14:01:43,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:43,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:01:43,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:01:43,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:01:43,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,110 INFO L137 Inliner]: procedures = 23, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 927 [2021-11-19 14:01:44,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:01:44,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:01:44,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:01:44,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:01:44,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:01:44,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:01:44,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:01:44,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:01:44,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:01:44,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:01:44,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:01:44,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:01:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:01:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:01:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:01:44,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:01:44,438 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:01:44,440 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:01:45,492 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:01:46,328 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:01:46,328 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:01:46,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:01:46 BoogieIcfgContainer [2021-11-19 14:01:46,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:01:46,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:01:46,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:01:46,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:01:46,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:01:43" (1/3) ... [2021-11-19 14:01:46,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340e7ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:01:46, skipping insertion in model container [2021-11-19 14:01:46,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (2/3) ... [2021-11-19 14:01:46,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340e7ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:01:46, skipping insertion in model container [2021-11-19 14:01:46,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:01:46" (3/3) ... [2021-11-19 14:01:46,344 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2021-11-19 14:01:46,356 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:01:46,356 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:01:46,418 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:01:46,425 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 [2021-11-19 14:01:46,425 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:01:46,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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) [2021-11-19 14:01:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 14:01:46,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:46,453 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] [2021-11-19 14:01:46,454 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:46,459 INFO L85 PathProgramCache]: Analyzing trace with hash 197412647, now seen corresponding path program 1 times [2021-11-19 14:01:46,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:46,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084053261] [2021-11-19 14:01:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:46,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:47,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:47,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084053261] [2021-11-19 14:01:47,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084053261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:47,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:47,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:47,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435000575] [2021-11-19 14:01:47,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:47,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:47,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:47,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:47,199 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-19 14:01:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:47,423 INFO L93 Difference]: Finished difference Result 180 states and 288 transitions. [2021-11-19 14:01:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:47,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2021-11-19 14:01:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:47,441 INFO L225 Difference]: With dead ends: 180 [2021-11-19 14:01:47,441 INFO L226 Difference]: Without dead ends: 158 [2021-11-19 14:01:47,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:47,451 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 29 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:47,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 372 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-19 14:01:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2021-11-19 14:01:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 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) [2021-11-19 14:01:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2021-11-19 14:01:47,552 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2021-11-19 14:01:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:47,553 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2021-11-19 14:01:47,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-19 14:01:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2021-11-19 14:01:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 14:01:47,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:47,557 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] [2021-11-19 14:01:47,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:01:47,558 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:47,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1756592234, now seen corresponding path program 1 times [2021-11-19 14:01:47,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:47,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387944167] [2021-11-19 14:01:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:47,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:47,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:47,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387944167] [2021-11-19 14:01:47,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387944167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:47,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:47,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:47,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040786557] [2021-11-19 14:01:47,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:47,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:47,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:47,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:47,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:47,821 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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) [2021-11-19 14:01:48,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:48,000 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2021-11-19 14:01:48,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:48,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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 [2021-11-19 14:01:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:48,007 INFO L225 Difference]: With dead ends: 180 [2021-11-19 14:01:48,008 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 14:01:48,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:48,012 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:48,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 385 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:48,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 14:01:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-19 14:01:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 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) [2021-11-19 14:01:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2021-11-19 14:01:48,030 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2021-11-19 14:01:48,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:48,031 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2021-11-19 14:01:48,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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) [2021-11-19 14:01:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2021-11-19 14:01:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 14:01:48,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:48,034 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] [2021-11-19 14:01:48,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:01:48,035 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:48,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1442996368, now seen corresponding path program 1 times [2021-11-19 14:01:48,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:48,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795616340] [2021-11-19 14:01:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:48,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:48,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:48,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795616340] [2021-11-19 14:01:48,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795616340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:48,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:48,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:48,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931274090] [2021-11-19 14:01:48,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:48,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:48,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:48,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:48,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:48,312 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-19 14:01:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:48,530 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2021-11-19 14:01:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:48,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2021-11-19 14:01:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:48,533 INFO L225 Difference]: With dead ends: 180 [2021-11-19 14:01:48,534 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 14:01:48,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:48,539 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:48,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:48,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 14:01:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-19 14:01:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 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) [2021-11-19 14:01:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2021-11-19 14:01:48,566 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2021-11-19 14:01:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:48,567 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2021-11-19 14:01:48,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-19 14:01:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2021-11-19 14:01:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:01:48,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:48,582 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] [2021-11-19 14:01:48,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 14:01:48,583 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:48,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1840543469, now seen corresponding path program 1 times [2021-11-19 14:01:48,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:48,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757699013] [2021-11-19 14:01:48,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:48,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:48,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:48,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757699013] [2021-11-19 14:01:48,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757699013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:48,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:48,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:48,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058948611] [2021-11-19 14:01:48,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:48,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:48,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:48,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:48,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:48,826 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2021-11-19 14:01:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:49,001 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2021-11-19 14:01:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:49,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2021-11-19 14:01:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:49,006 INFO L225 Difference]: With dead ends: 180 [2021-11-19 14:01:49,006 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 14:01:49,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:49,008 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:49,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 383 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 14:01:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-19 14:01:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 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) [2021-11-19 14:01:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2021-11-19 14:01:49,030 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2021-11-19 14:01:49,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:49,032 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2021-11-19 14:01:49,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2021-11-19 14:01:49,033 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2021-11-19 14:01:49,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 14:01:49,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:49,037 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] [2021-11-19 14:01:49,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 14:01:49,038 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:49,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:49,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1274149959, now seen corresponding path program 1 times [2021-11-19 14:01:49,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:49,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321193212] [2021-11-19 14:01:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:49,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:49,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:49,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321193212] [2021-11-19 14:01:49,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321193212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:49,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:49,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:49,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506880277] [2021-11-19 14:01:49,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:49,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:49,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:49,199 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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) [2021-11-19 14:01:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:49,361 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2021-11-19 14:01:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:49,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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 [2021-11-19 14:01:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:49,364 INFO L225 Difference]: With dead ends: 180 [2021-11-19 14:01:49,364 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 14:01:49,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:49,366 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:49,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 14:01:49,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-19 14:01:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 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) [2021-11-19 14:01:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2021-11-19 14:01:49,378 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2021-11-19 14:01:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:49,378 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2021-11-19 14:01:49,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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) [2021-11-19 14:01:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2021-11-19 14:01:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:01:49,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:49,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:49,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 14:01:49,381 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:49,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1870659551, now seen corresponding path program 1 times [2021-11-19 14:01:49,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:49,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376960595] [2021-11-19 14:01:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:49,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:49,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:49,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376960595] [2021-11-19 14:01:49,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376960595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:49,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:49,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:49,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765124303] [2021-11-19 14:01:49,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:49,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:49,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:49,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:49,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:49,794 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-19 14:01:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:49,977 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2021-11-19 14:01:49,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:49,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 60 [2021-11-19 14:01:49,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:49,980 INFO L225 Difference]: With dead ends: 178 [2021-11-19 14:01:49,980 INFO L226 Difference]: Without dead ends: 158 [2021-11-19 14:01:49,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:49,982 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:49,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 544 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:49,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-19 14:01:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2021-11-19 14:01:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 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) [2021-11-19 14:01:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2021-11-19 14:01:49,991 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2021-11-19 14:01:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:49,992 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2021-11-19 14:01:49,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-19 14:01:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2021-11-19 14:01:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 14:01:49,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:49,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:49,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 14:01:49,995 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:49,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2051022730, now seen corresponding path program 1 times [2021-11-19 14:01:49,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:49,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409417001] [2021-11-19 14:01:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:49,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:50,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:50,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409417001] [2021-11-19 14:01:50,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409417001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:50,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:50,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:50,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680554094] [2021-11-19 14:01:50,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:50,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:50,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:50,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:50,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:50,156 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-19 14:01:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:50,282 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2021-11-19 14:01:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:50,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2021-11-19 14:01:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:50,285 INFO L225 Difference]: With dead ends: 179 [2021-11-19 14:01:50,285 INFO L226 Difference]: Without dead ends: 159 [2021-11-19 14:01:50,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:50,286 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:50,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 389 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:50,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-19 14:01:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2021-11-19 14:01:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 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) [2021-11-19 14:01:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2021-11-19 14:01:50,295 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2021-11-19 14:01:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:50,295 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2021-11-19 14:01:50,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-19 14:01:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2021-11-19 14:01:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 14:01:50,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:50,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:50,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 14:01:50,298 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:50,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:50,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1151961584, now seen corresponding path program 1 times [2021-11-19 14:01:50,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:50,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78735780] [2021-11-19 14:01:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:50,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:50,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:50,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78735780] [2021-11-19 14:01:50,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78735780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:50,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:50,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:50,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362625078] [2021-11-19 14:01:50,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:50,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:01:50,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:01:50,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:50,818 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-11-19 14:01:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:50,959 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2021-11-19 14:01:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:50,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2021-11-19 14:01:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:50,962 INFO L225 Difference]: With dead ends: 179 [2021-11-19 14:01:50,962 INFO L226 Difference]: Without dead ends: 159 [2021-11-19 14:01:50,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:01:50,963 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:50,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 380 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-19 14:01:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2021-11-19 14:01:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 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) [2021-11-19 14:01:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2021-11-19 14:01:50,971 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2021-11-19 14:01:50,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:50,972 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2021-11-19 14:01:50,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-11-19 14:01:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2021-11-19 14:01:50,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 14:01:50,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:50,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:50,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:01:50,974 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:50,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1342092508, now seen corresponding path program 1 times [2021-11-19 14:01:50,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:50,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543219666] [2021-11-19 14:01:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:50,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:51,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:51,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543219666] [2021-11-19 14:01:51,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543219666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:51,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:51,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 14:01:51,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375946988] [2021-11-19 14:01:51,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:51,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:51,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:51,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:51,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:01:51,111 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-11-19 14:01:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:51,339 INFO L93 Difference]: Finished difference Result 201 states and 312 transitions. [2021-11-19 14:01:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:01:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 64 [2021-11-19 14:01:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:51,342 INFO L225 Difference]: With dead ends: 201 [2021-11-19 14:01:51,342 INFO L226 Difference]: Without dead ends: 181 [2021-11-19 14:01:51,342 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 [2021-11-19 14:01:51,343 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 44 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:51,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 776 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:51,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-19 14:01:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-11-19 14:01:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 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) [2021-11-19 14:01:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2021-11-19 14:01:51,351 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2021-11-19 14:01:51,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:51,351 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2021-11-19 14:01:51,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-11-19 14:01:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2021-11-19 14:01:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 14:01:51,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:51,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:51,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 14:01:51,353 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:51,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:51,354 INFO L85 PathProgramCache]: Analyzing trace with hash 287972926, now seen corresponding path program 1 times [2021-11-19 14:01:51,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:51,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232716888] [2021-11-19 14:01:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:51,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:52,111 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:52,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232716888] [2021-11-19 14:01:52,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232716888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:52,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374038342] [2021-11-19 14:01:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:52,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:01:52,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:01:52,116 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:01:52,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d71e7e-9763-4324-9454-93ef1cb03850/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:01:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:52,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:01:52,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:50,106 INFO L328 TraceCheckSpWp]: Computing backward predicates...