./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7 --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 eebca77f45674e9c747126627d8fffbab7911c70d4e1d781272ecaec26772b5e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:57:20,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:57:20,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:57:20,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:57:20,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:57:20,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:57:20,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:57:20,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:57:20,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:57:20,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:57:20,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:57:20,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:57:20,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:57:20,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:57:20,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:57:20,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:57:20,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:57:20,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:57:20,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:57:20,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:57:20,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:57:20,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:57:20,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:57:20,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:57:20,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:57:20,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:57:20,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:57:20,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:57:20,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:57:20,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:57:20,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:57:20,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:57:20,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:57:20,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:57:20,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:57:20,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:57:20,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:57:20,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:57:20,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:57:20,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:57:20,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:57:20,253 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:57:20,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:57:20,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:57:20,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:57:20,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:57:20,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:57:20,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:57:20,318 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:57:20,318 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:57:20,319 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:57:20,319 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:57:20,320 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:57:20,321 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:57:20,321 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:57:20,321 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:57:20,322 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:57:20,322 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:57:20,322 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:57:20,322 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:57:20,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:57:20,324 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:57:20,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:57:20,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:57:20,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:57:20,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:57:20,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:57:20,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:57:20,328 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:57:20,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:57:20,329 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:57:20,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:57:20,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:57:20,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:57:20,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:57:20,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:57:20,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:57:20,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:57:20,331 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:57:20,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:57:20,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:57:20,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:57:20,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:57:20,333 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_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eebca77f45674e9c747126627d8fffbab7911c70d4e1d781272ecaec26772b5e [2021-11-25 18:57:20,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:57:20,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:57:20,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:57:20,655 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:57:20,656 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:57:20,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c [2021-11-25 18:57:20,734 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/data/30aba1de5/fb712942306c4821a0cf1d5adb3b8ce3/FLAG70ec0c183 [2021-11-25 18:57:21,810 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:57:21,811 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c [2021-11-25 18:57:21,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/data/30aba1de5/fb712942306c4821a0cf1d5adb3b8ce3/FLAG70ec0c183 [2021-11-25 18:57:22,160 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/data/30aba1de5/fb712942306c4821a0cf1d5adb3b8ce3 [2021-11-25 18:57:22,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:57:22,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:57:22,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:57:22,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:57:22,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:57:22,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:57:22" (1/1) ... [2021-11-25 18:57:22,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6822b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:22, skipping insertion in model container [2021-11-25 18:57:22,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:57:22" (1/1) ... [2021-11-25 18:57:22,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:57:22,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:57:25,214 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_c6d2e576-6772-416b-a537-77fde71f0350/sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c[377340,377353] [2021-11-25 18:57:25,255 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_c6d2e576-6772-416b-a537-77fde71f0350/sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c[383339,383352] [2021-11-25 18:57:25,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:57:25,637 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:57:26,993 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_c6d2e576-6772-416b-a537-77fde71f0350/sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c[377340,377353] [2021-11-25 18:57:27,002 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_c6d2e576-6772-416b-a537-77fde71f0350/sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c[383339,383352] [2021-11-25 18:57:27,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:57:27,124 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:57:27,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27 WrapperNode [2021-11-25 18:57:27,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:57:27,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:57:27,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:57:27,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:57:27,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27" (1/1) ... [2021-11-25 18:57:27,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27" (1/1) ... [2021-11-25 18:57:27,709 INFO L137 Inliner]: procedures = 62, calls = 68, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 13025 [2021-11-25 18:57:27,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:57:27,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:57:27,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:57:27,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:57:27,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27" (1/1) ... [2021-11-25 18:57:27,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27" (1/1) ... [2021-11-25 18:57:27,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27" (1/1) ... [2021-11-25 18:57:27,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27" (1/1) ... [2021-11-25 18:57:28,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27" (1/1) ... [2021-11-25 18:57:28,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27" (1/1) ... [2021-11-25 18:57:28,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27" (1/1) ... [2021-11-25 18:57:28,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:57:28,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:57:28,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:57:28,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:57:28,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27" (1/1) ... [2021-11-25 18:57:28,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:57:28,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:28,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:57:28,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:57:28,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:57:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 18:57:28,707 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 18:57:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 18:57:28,707 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 18:57:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 18:57:28,708 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 18:57:28,708 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 18:57:28,708 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 18:57:28,708 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 18:57:28,709 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 18:57:28,709 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 18:57:28,709 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 18:57:28,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:57:28,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:57:28,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:57:29,009 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:57:29,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:57:37,387 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:57:40,212 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:57:40,213 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-25 18:57:40,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:57:40 BoogieIcfgContainer [2021-11-25 18:57:40,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:57:40,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:57:40,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:57:40,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:57:40,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:57:22" (1/3) ... [2021-11-25 18:57:40,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b35154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:57:40, skipping insertion in model container [2021-11-25 18:57:40,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:27" (2/3) ... [2021-11-25 18:57:40,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b35154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:57:40, skipping insertion in model container [2021-11-25 18:57:40,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:57:40" (3/3) ... [2021-11-25 18:57:40,229 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.09.cil-1.c [2021-11-25 18:57:40,235 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:57:40,236 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 18:57:40,309 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:57:40,317 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 [2021-11-25 18:57:40,318 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 18:57:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-25 18:57:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 18:57:40,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:40,404 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] [2021-11-25 18:57:40,405 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:40,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash -186017883, now seen corresponding path program 1 times [2021-11-25 18:57:40,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:40,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372326817] [2021-11-25 18:57:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:40,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:57:40,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:40,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372326817] [2021-11-25 18:57:40,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372326817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:40,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:40,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:57:40,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531370083] [2021-11-25 18:57:40,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:40,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:57:40,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:57:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:57:40,970 INFO L87 Difference]: Start difference. First operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:57:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:42,059 INFO L93 Difference]: Finished difference Result 3734 states and 7259 transitions. [2021-11-25 18:57:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:57:42,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2021-11-25 18:57:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:42,088 INFO L225 Difference]: With dead ends: 3734 [2021-11-25 18:57:42,089 INFO L226 Difference]: Without dead ends: 1935 [2021-11-25 18:57:42,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:57:42,102 INFO L933 BasicCegarLoop]: 3421 mSDtfsCounter, 3680 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3680 SdHoareTripleChecker+Valid, 6756 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:42,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3680 Valid, 6756 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:57:42,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-11-25 18:57:42,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1934. [2021-11-25 18:57:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1878 states have (on average 1.9297124600638977) internal successors, (3624), 1881 states have internal predecessors, (3624), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-25 18:57:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3708 transitions. [2021-11-25 18:57:42,261 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3708 transitions. Word has length 58 [2021-11-25 18:57:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:42,262 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 3708 transitions. [2021-11-25 18:57:42,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:57:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3708 transitions. [2021-11-25 18:57:42,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-25 18:57:42,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:42,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:42,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:57:42,274 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:42,275 INFO L85 PathProgramCache]: Analyzing trace with hash -272451214, now seen corresponding path program 1 times [2021-11-25 18:57:42,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:42,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692075815] [2021-11-25 18:57:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:42,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:57:42,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:42,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692075815] [2021-11-25 18:57:42,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692075815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:57:42,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259735493] [2021-11-25 18:57:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:42,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:42,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:42,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:42,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:57:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:42,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:57:42,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 18:57:43,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:43,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259735493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:43,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:57:43,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:57:43,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258786085] [2021-11-25 18:57:43,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:43,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:43,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:43,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:57:43,148 INFO L87 Difference]: Start difference. First operand 1934 states and 3708 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:57:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:43,784 INFO L93 Difference]: Finished difference Result 2503 states and 4585 transitions. [2021-11-25 18:57:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:43,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-25 18:57:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:43,806 INFO L225 Difference]: With dead ends: 2503 [2021-11-25 18:57:43,806 INFO L226 Difference]: Without dead ends: 2215 [2021-11-25 18:57:43,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:57:43,811 INFO L933 BasicCegarLoop]: 3292 mSDtfsCounter, 3471 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3472 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:43,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 3472 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:57:43,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-11-25 18:57:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2211. [2021-11-25 18:57:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2107 states have (on average 1.8818224964404366) internal successors, (3965), 2111 states have internal predecessors, (3965), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2021-11-25 18:57:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 4121 transitions. [2021-11-25 18:57:43,930 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 4121 transitions. Word has length 115 [2021-11-25 18:57:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:43,931 INFO L470 AbstractCegarLoop]: Abstraction has 2211 states and 4121 transitions. [2021-11-25 18:57:43,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:57:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 4121 transitions. [2021-11-25 18:57:43,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-25 18:57:43,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:43,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:43,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:57:44,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 18:57:44,152 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:44,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:44,153 INFO L85 PathProgramCache]: Analyzing trace with hash 2001997428, now seen corresponding path program 1 times [2021-11-25 18:57:44,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:44,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983683836] [2021-11-25 18:57:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:44,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:57:44,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:44,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983683836] [2021-11-25 18:57:44,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983683836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:57:44,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123767190] [2021-11-25 18:57:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:44,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:44,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:44,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:44,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:57:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:44,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:57:44,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:57:44,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:44,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123767190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:44,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:57:44,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:57:44,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608597477] [2021-11-25 18:57:44,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:44,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:44,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:57:44,841 INFO L87 Difference]: Start difference. First operand 2211 states and 4121 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:57:45,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:45,505 INFO L93 Difference]: Finished difference Result 3328 states and 5836 transitions. [2021-11-25 18:57:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:45,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-25 18:57:45,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:45,532 INFO L225 Difference]: With dead ends: 3328 [2021-11-25 18:57:45,532 INFO L226 Difference]: Without dead ends: 2763 [2021-11-25 18:57:45,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:57:45,538 INFO L933 BasicCegarLoop]: 3262 mSDtfsCounter, 3465 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:45,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3465 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:57:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-11-25 18:57:45,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2757. [2021-11-25 18:57:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2559 states have (on average 1.8112543962485346) internal successors, (4635), 2565 states have internal predecessors, (4635), 148 states have call successors, (148), 48 states have call predecessors, (148), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2021-11-25 18:57:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4931 transitions. [2021-11-25 18:57:45,723 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4931 transitions. Word has length 115 [2021-11-25 18:57:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:45,726 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 4931 transitions. [2021-11-25 18:57:45,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:57:45,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4931 transitions. [2021-11-25 18:57:45,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-25 18:57:45,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:45,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:45,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:45,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:45,959 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:45,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:45,960 INFO L85 PathProgramCache]: Analyzing trace with hash 130141430, now seen corresponding path program 1 times [2021-11-25 18:57:45,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:45,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275058013] [2021-11-25 18:57:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:45,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:57:46,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:46,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275058013] [2021-11-25 18:57:46,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275058013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:57:46,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259197687] [2021-11-25 18:57:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:46,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:46,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:46,094 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:46,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:57:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:46,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:57:46,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 18:57:46,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:46,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259197687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:46,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:57:46,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:57:46,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450879732] [2021-11-25 18:57:46,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:46,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:46,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:46,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:46,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:57:46,529 INFO L87 Difference]: Start difference. First operand 2757 states and 4931 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:57:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:47,185 INFO L93 Difference]: Finished difference Result 4954 states and 8288 transitions. [2021-11-25 18:57:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:47,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-25 18:57:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:47,223 INFO L225 Difference]: With dead ends: 4954 [2021-11-25 18:57:47,223 INFO L226 Difference]: Without dead ends: 3843 [2021-11-25 18:57:47,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:57:47,237 INFO L933 BasicCegarLoop]: 3290 mSDtfsCounter, 3474 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3474 SdHoareTripleChecker+Valid, 3470 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:47,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3474 Valid, 3470 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:57:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2021-11-25 18:57:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3833. [2021-11-25 18:57:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3451 states have (on average 1.724427702115329) internal successors, (5951), 3461 states have internal predecessors, (5951), 284 states have call successors, (284), 96 states have call predecessors, (284), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2021-11-25 18:57:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 6519 transitions. [2021-11-25 18:57:47,510 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 6519 transitions. Word has length 115 [2021-11-25 18:57:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:47,511 INFO L470 AbstractCegarLoop]: Abstraction has 3833 states and 6519 transitions. [2021-11-25 18:57:47,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:57:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 6519 transitions. [2021-11-25 18:57:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-25 18:57:47,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:47,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:47,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:47,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:47,743 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash 825573556, now seen corresponding path program 1 times [2021-11-25 18:57:47,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:47,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648903896] [2021-11-25 18:57:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:47,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:57:47,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:47,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648903896] [2021-11-25 18:57:47,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648903896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:57:47,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732565626] [2021-11-25 18:57:47,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:47,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:47,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:47,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:47,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:57:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:57:48,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 18:57:48,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:48,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732565626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:48,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:57:48,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:57:48,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740766356] [2021-11-25 18:57:48,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:48,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:48,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:48,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:57:48,381 INFO L87 Difference]: Start difference. First operand 3833 states and 6519 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:57:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:49,108 INFO L93 Difference]: Finished difference Result 8158 states and 13092 transitions. [2021-11-25 18:57:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-25 18:57:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:49,161 INFO L225 Difference]: With dead ends: 8158 [2021-11-25 18:57:49,162 INFO L226 Difference]: Without dead ends: 5971 [2021-11-25 18:57:49,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:57:49,177 INFO L933 BasicCegarLoop]: 3262 mSDtfsCounter, 3459 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:49,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3459 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:57:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-11-25 18:57:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5953. [2021-11-25 18:57:49,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5211 states have (on average 1.637881404720783) internal successors, (8535), 5229 states have internal predecessors, (8535), 548 states have call successors, (548), 192 states have call predecessors, (548), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2021-11-25 18:57:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 9631 transitions. [2021-11-25 18:57:49,533 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 9631 transitions. Word has length 115 [2021-11-25 18:57:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:49,534 INFO L470 AbstractCegarLoop]: Abstraction has 5953 states and 9631 transitions. [2021-11-25 18:57:49,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:57:49,535 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 9631 transitions. [2021-11-25 18:57:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-25 18:57:49,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:49,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:49,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:49,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:49,763 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash 476874934, now seen corresponding path program 1 times [2021-11-25 18:57:49,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:49,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669820484] [2021-11-25 18:57:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:49,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:57:49,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:49,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669820484] [2021-11-25 18:57:49,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669820484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:57:49,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422768206] [2021-11-25 18:57:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:49,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:49,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:49,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:49,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:57:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:57:50,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:57:50,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:50,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422768206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:50,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:57:50,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:57:50,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987118630] [2021-11-25 18:57:50,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:50,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:50,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:57:50,400 INFO L87 Difference]: Start difference. First operand 5953 states and 9631 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:57:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:51,289 INFO L93 Difference]: Finished difference Result 14470 states and 22500 transitions. [2021-11-25 18:57:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-25 18:57:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:51,388 INFO L225 Difference]: With dead ends: 14470 [2021-11-25 18:57:51,390 INFO L226 Difference]: Without dead ends: 10163 [2021-11-25 18:57:51,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:57:51,415 INFO L933 BasicCegarLoop]: 3262 mSDtfsCounter, 3453 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:51,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3453 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:57:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-11-25 18:57:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 10129. [2021-11-25 18:57:52,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10129 states, 8683 states have (on average 1.5670851088333526) internal successors, (13607), 8717 states have internal predecessors, (13607), 1060 states have call successors, (1060), 384 states have call predecessors, (1060), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2021-11-25 18:57:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10129 states to 10129 states and 15727 transitions. [2021-11-25 18:57:52,110 INFO L78 Accepts]: Start accepts. Automaton has 10129 states and 15727 transitions. Word has length 115 [2021-11-25 18:57:52,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:52,111 INFO L470 AbstractCegarLoop]: Abstraction has 10129 states and 15727 transitions. [2021-11-25 18:57:52,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:57:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 10129 states and 15727 transitions. [2021-11-25 18:57:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-25 18:57:52,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:52,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:52,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:52,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:57:52,350 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:52,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:52,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1957853752, now seen corresponding path program 1 times [2021-11-25 18:57:52,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:52,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411757831] [2021-11-25 18:57:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:52,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-25 18:57:52,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:52,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411757831] [2021-11-25 18:57:52,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411757831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:52,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:52,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:57:52,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662944708] [2021-11-25 18:57:52,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:52,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:52,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:52,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:52,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:52,439 INFO L87 Difference]: Start difference. First operand 10129 states and 15727 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:57:53,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:53,356 INFO L93 Difference]: Finished difference Result 16723 states and 25776 transitions. [2021-11-25 18:57:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:53,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-11-25 18:57:53,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:53,425 INFO L225 Difference]: With dead ends: 16723 [2021-11-25 18:57:53,425 INFO L226 Difference]: Without dead ends: 12401 [2021-11-25 18:57:53,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:53,450 INFO L933 BasicCegarLoop]: 3348 mSDtfsCounter, 100 mSDsluCounter, 3501 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6602 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:53,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 6602 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:57:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12401 states. [2021-11-25 18:57:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12401 to 11713. [2021-11-25 18:57:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11713 states, 10203 states have (on average 1.5908066255023032) internal successors, (16231), 10237 states have internal predecessors, (16231), 1092 states have call successors, (1092), 416 states have call predecessors, (1092), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2021-11-25 18:57:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11713 states to 11713 states and 18415 transitions. [2021-11-25 18:57:54,079 INFO L78 Accepts]: Start accepts. Automaton has 11713 states and 18415 transitions. Word has length 115 [2021-11-25 18:57:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:54,080 INFO L470 AbstractCegarLoop]: Abstraction has 11713 states and 18415 transitions. [2021-11-25 18:57:54,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:57:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 11713 states and 18415 transitions. [2021-11-25 18:57:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 18:57:54,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:54,124 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 18:57:54,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:57:54,125 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:54,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1694548206, now seen corresponding path program 1 times [2021-11-25 18:57:54,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:54,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107367971] [2021-11-25 18:57:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:54,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 18:57:54,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:54,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107367971] [2021-11-25 18:57:54,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107367971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:54,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:54,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:57:54,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718596316] [2021-11-25 18:57:54,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:54,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:54,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:54,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:54,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:54,267 INFO L87 Difference]: Start difference. First operand 11713 states and 18415 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:57:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:55,589 INFO L93 Difference]: Finished difference Result 31558 states and 48788 transitions. [2021-11-25 18:57:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-25 18:57:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:55,710 INFO L225 Difference]: With dead ends: 31558 [2021-11-25 18:57:55,710 INFO L226 Difference]: Without dead ends: 21491 [2021-11-25 18:57:55,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:55,770 INFO L933 BasicCegarLoop]: 3264 mSDtfsCounter, 3461 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:55,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3461 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:57:55,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21491 states. [2021-11-25 18:57:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21491 to 21393. [2021-11-25 18:57:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21393 states, 18443 states have (on average 1.5480670172965352) internal successors, (28551), 18509 states have internal predecessors, (28551), 2116 states have call successors, (2116), 832 states have call predecessors, (2116), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2021-11-25 18:57:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21393 states to 21393 states and 32783 transitions. [2021-11-25 18:57:56,946 INFO L78 Accepts]: Start accepts. Automaton has 21393 states and 32783 transitions. Word has length 156 [2021-11-25 18:57:56,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:56,948 INFO L470 AbstractCegarLoop]: Abstraction has 21393 states and 32783 transitions. [2021-11-25 18:57:56,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:57:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 21393 states and 32783 transitions. [2021-11-25 18:57:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 18:57:57,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:57,032 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 18:57:57,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:57:57,032 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash -808105266, now seen corresponding path program 1 times [2021-11-25 18:57:57,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:57,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496062760] [2021-11-25 18:57:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:57,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 18:57:57,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:57,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496062760] [2021-11-25 18:57:57,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496062760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:57,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:57,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:57:57,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609569671] [2021-11-25 18:57:57,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:57,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:57,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:57,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:57,193 INFO L87 Difference]: Start difference. First operand 21393 states and 32783 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:57:58,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:58,897 INFO L93 Difference]: Finished difference Result 60310 states and 91924 transitions. [2021-11-25 18:57:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:58,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-25 18:57:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:59,103 INFO L225 Difference]: With dead ends: 60310 [2021-11-25 18:57:59,103 INFO L226 Difference]: Without dead ends: 40563 [2021-11-25 18:57:59,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:59,190 INFO L933 BasicCegarLoop]: 3264 mSDtfsCounter, 3463 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:59,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3463 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:57:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40563 states. [2021-11-25 18:58:01,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40563 to 40369. [2021-11-25 18:58:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40369 states, 34603 states have (on average 1.5186833511545241) internal successors, (52551), 34733 states have internal predecessors, (52551), 4100 states have call successors, (4100), 1664 states have call predecessors, (4100), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2021-11-25 18:58:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40369 states to 40369 states and 60751 transitions. [2021-11-25 18:58:01,657 INFO L78 Accepts]: Start accepts. Automaton has 40369 states and 60751 transitions. Word has length 156 [2021-11-25 18:58:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:58:01,658 INFO L470 AbstractCegarLoop]: Abstraction has 40369 states and 60751 transitions. [2021-11-25 18:58:01,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:58:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 40369 states and 60751 transitions. [2021-11-25 18:58:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 18:58:01,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:58:01,793 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 18:58:01,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:58:01,793 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:58:01,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:58:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1998239700, now seen corresponding path program 1 times [2021-11-25 18:58:01,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:58:01,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459385700] [2021-11-25 18:58:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:01,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:58:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:58:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 18:58:01,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:58:01,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459385700] [2021-11-25 18:58:01,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459385700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:58:01,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:58:01,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:58:01,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065135165] [2021-11-25 18:58:01,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:58:01,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:58:01,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:58:01,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:58:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:58:01,892 INFO L87 Difference]: Start difference. First operand 40369 states and 60751 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:58:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:58:05,145 INFO L93 Difference]: Finished difference Result 116662 states and 175828 transitions. [2021-11-25 18:58:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:58:05,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-25 18:58:05,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:58:05,520 INFO L225 Difference]: With dead ends: 116662 [2021-11-25 18:58:05,520 INFO L226 Difference]: Without dead ends: 77939 [2021-11-25 18:58:05,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:58:05,624 INFO L933 BasicCegarLoop]: 3264 mSDtfsCounter, 3465 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:58:05,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3465 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:58:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77939 states. [2021-11-25 18:58:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77939 to 77553. [2021-11-25 18:58:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77553 states, 66283 states have (on average 1.4976841724122325) internal successors, (99271), 66541 states have internal predecessors, (99271), 7940 states have call successors, (7940), 3328 states have call predecessors, (7940), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2021-11-25 18:58:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77553 states to 77553 states and 115151 transitions. [2021-11-25 18:58:09,459 INFO L78 Accepts]: Start accepts. Automaton has 77553 states and 115151 transitions. Word has length 156 [2021-11-25 18:58:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:58:09,459 INFO L470 AbstractCegarLoop]: Abstraction has 77553 states and 115151 transitions. [2021-11-25 18:58:09,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:58:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand 77553 states and 115151 transitions. [2021-11-25 18:58:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 18:58:09,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:58:09,646 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 18:58:09,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:58:09,646 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:58:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:58:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1253646966, now seen corresponding path program 1 times [2021-11-25 18:58:09,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:58:09,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414646751] [2021-11-25 18:58:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:09,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:58:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:58:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 18:58:09,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:58:09,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414646751] [2021-11-25 18:58:09,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414646751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:58:09,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:58:09,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:58:09,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859464842] [2021-11-25 18:58:09,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:58:09,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:58:09,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:58:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:58:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:58:09,732 INFO L87 Difference]: Start difference. First operand 77553 states and 115151 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:58:14,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:58:14,813 INFO L93 Difference]: Finished difference Result 227062 states and 338900 transitions. [2021-11-25 18:58:14,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:58:14,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-25 18:58:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:58:15,924 INFO L225 Difference]: With dead ends: 227062 [2021-11-25 18:58:15,925 INFO L226 Difference]: Without dead ends: 151155 [2021-11-25 18:58:16,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:58:16,146 INFO L933 BasicCegarLoop]: 3272 mSDtfsCounter, 3468 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3468 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:58:16,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3468 Valid, 3452 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:58:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151155 states. [2021-11-25 18:58:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151155 to 150385. [2021-11-25 18:58:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150385 states, 128363 states have (on average 1.4813536611017193) internal successors, (190151), 128877 states have internal predecessors, (190151), 15364 states have call successors, (15364), 6656 states have call predecessors, (15364), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2021-11-25 18:58:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150385 states to 150385 states and 220879 transitions. [2021-11-25 18:58:21,941 INFO L78 Accepts]: Start accepts. Automaton has 150385 states and 220879 transitions. Word has length 156 [2021-11-25 18:58:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:58:21,942 INFO L470 AbstractCegarLoop]: Abstraction has 150385 states and 220879 transitions. [2021-11-25 18:58:21,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:58:21,943 INFO L276 IsEmpty]: Start isEmpty. Operand 150385 states and 220879 transitions. [2021-11-25 18:58:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-25 18:58:22,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:58:22,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:58:22,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:58:22,436 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:58:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:58:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1021471434, now seen corresponding path program 1 times [2021-11-25 18:58:22,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:58:22,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779810075] [2021-11-25 18:58:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:22,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:58:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:58:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-25 18:58:22,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:58:22,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779810075] [2021-11-25 18:58:22,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779810075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:58:22,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165782197] [2021-11-25 18:58:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:22,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:58:22,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:58:22,587 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:58:22,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d2e576-6772-416b-a537-77fde71f0350/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:58:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:58:22,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:58:22,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 18:58:23,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:58:23,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165782197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:58:23,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:58:23,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 18:58:23,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388344054] [2021-11-25 18:58:23,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:58:23,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:58:23,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:58:23,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:58:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:58:23,135 INFO L87 Difference]: Start difference. First operand 150385 states and 220879 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)