./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P --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 ead4d47009bf2f1ade65f6eacfdab211d65347e20b879f4822b8ceaab9ef42cd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:41:40,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:41:40,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:41:40,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:41:40,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:41:40,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:41:40,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:41:40,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:41:40,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:41:40,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:41:40,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:41:40,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:41:40,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:41:40,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:41:40,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:41:40,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:41:40,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:41:40,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:41:40,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:41:40,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:41:40,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:41:40,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:41:40,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:41:40,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:41:40,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:41:40,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:41:40,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:41:40,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:41:40,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:41:40,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:41:40,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:41:40,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:41:40,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:41:40,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:41:40,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:41:40,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:41:40,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:41:40,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:41:40,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:41:40,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:41:40,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:41:40,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:41:40,982 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:41:40,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:41:40,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:41:40,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:41:40,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:41:40,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:41:40,985 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:41:40,985 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:41:40,985 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:41:40,986 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:41:40,986 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:41:40,986 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:41:40,986 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:41:40,987 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:41:40,987 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:41:40,987 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:41:40,987 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:41:40,988 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:41:40,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:41:40,989 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:41:40,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:41:40,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:41:40,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:41:40,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:41:40,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:41:40,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:41:40,991 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:41:40,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:41:40,991 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:41:40,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:41:40,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:41:40,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:41:40,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:41:40,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:41:40,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:41:40,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:41:40,993 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:41:40,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:41:40,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:41:40,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:41:40,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:41:40,995 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_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ead4d47009bf2f1ade65f6eacfdab211d65347e20b879f4822b8ceaab9ef42cd [2021-11-21 01:41:41,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:41:41,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:41:41,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:41:41,348 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:41:41,349 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:41:41,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c [2021-11-21 01:41:41,430 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/data/d55607207/cb9fff586f0b4d4cab7a2723aa3bd906/FLAG74e0f7b44 [2021-11-21 01:41:42,454 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:41:42,454 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c [2021-11-21 01:41:42,501 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/data/d55607207/cb9fff586f0b4d4cab7a2723aa3bd906/FLAG74e0f7b44 [2021-11-21 01:41:42,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/data/d55607207/cb9fff586f0b4d4cab7a2723aa3bd906 [2021-11-21 01:41:42,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:41:42,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:41:42,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:41:42,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:41:42,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:41:42,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:41:42" (1/1) ... [2021-11-21 01:41:42,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f499134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:42, skipping insertion in model container [2021-11-21 01:41:42,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:41:42" (1/1) ... [2021-11-21 01:41:42,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:41:43,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:41:45,459 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_fc6ae75d-a57f-466f-86fa-abc5316e145b/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c[380593,380606] [2021-11-21 01:41:45,486 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_fc6ae75d-a57f-466f-86fa-abc5316e145b/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c[383339,383352] [2021-11-21 01:41:45,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:41:45,806 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:41:47,102 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_fc6ae75d-a57f-466f-86fa-abc5316e145b/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c[380593,380606] [2021-11-21 01:41:47,113 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_fc6ae75d-a57f-466f-86fa-abc5316e145b/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-2.c[383339,383352] [2021-11-21 01:41:47,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:41:47,275 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:41:47,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47 WrapperNode [2021-11-21 01:41:47,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:41:47,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:41:47,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:41:47,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:41:47,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47" (1/1) ... [2021-11-21 01:41:47,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47" (1/1) ... [2021-11-21 01:41:47,919 INFO L137 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13083 [2021-11-21 01:41:47,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:41:47,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:41:47,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:41:47,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:41:47,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47" (1/1) ... [2021-11-21 01:41:47,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47" (1/1) ... [2021-11-21 01:41:48,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47" (1/1) ... [2021-11-21 01:41:48,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47" (1/1) ... [2021-11-21 01:41:48,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47" (1/1) ... [2021-11-21 01:41:48,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47" (1/1) ... [2021-11-21 01:41:48,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47" (1/1) ... [2021-11-21 01:41:48,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:41:48,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:41:48,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:41:48,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:41:48,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47" (1/1) ... [2021-11-21 01:41:48,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:41:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:48,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:41:48,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:41:48,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:41:48,680 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 01:41:48,680 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 01:41:48,680 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-21 01:41:48,680 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-21 01:41:48,681 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 01:41:48,681 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 01:41:48,681 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 01:41:48,681 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 01:41:48,681 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 01:41:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 01:41:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 01:41:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 01:41:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:41:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:41:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:41:48,837 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:41:48,855 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:41:56,835 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:41:59,496 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:41:59,496 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-21 01:41:59,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:41:59 BoogieIcfgContainer [2021-11-21 01:41:59,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:41:59,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:41:59,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:41:59,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:41:59,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:41:42" (1/3) ... [2021-11-21 01:41:59,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe2160b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:41:59, skipping insertion in model container [2021-11-21 01:41:59,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:47" (2/3) ... [2021-11-21 01:41:59,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe2160b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:41:59, skipping insertion in model container [2021-11-21 01:41:59,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:41:59" (3/3) ... [2021-11-21 01:41:59,514 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.10.cil-2.c [2021-11-21 01:41:59,519 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:41:59,520 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 01:41:59,582 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:41:59,589 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 [2021-11-21 01:41:59,590 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 01:41:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-21 01:41:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 01:41:59,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:59,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:59,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:59,671 INFO L85 PathProgramCache]: Analyzing trace with hash -833195934, now seen corresponding path program 1 times [2021-11-21 01:41:59,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:59,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38742451] [2021-11-21 01:41:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:59,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:00,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38742451] [2021-11-21 01:42:00,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38742451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:00,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:42:00,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:42:00,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082745621] [2021-11-21 01:42:00,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:00,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:42:00,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:42:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:42:00,169 INFO L87 Difference]: Start difference. First operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-21 01:42:01,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:01,377 INFO L93 Difference]: Finished difference Result 3767 states and 7315 transitions. [2021-11-21 01:42:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:42:01,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 61 [2021-11-21 01:42:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:01,418 INFO L225 Difference]: With dead ends: 3767 [2021-11-21 01:42:01,419 INFO L226 Difference]: Without dead ends: 1957 [2021-11-21 01:42:01,432 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 [2021-11-21 01:42:01,438 INFO L933 BasicCegarLoop]: 3451 mSDtfsCounter, 3713 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:01,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 6812 Invalid, 708 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:42:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-11-21 01:42:01,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1956. [2021-11-21 01:42:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1898 states have (on average 1.9262381454162276) internal successors, (3656), 1901 states have internal predecessors, (3656), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-21 01:42:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3744 transitions. [2021-11-21 01:42:01,610 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3744 transitions. Word has length 61 [2021-11-21 01:42:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:01,611 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 3744 transitions. [2021-11-21 01:42:01,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-21 01:42:01,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3744 transitions. [2021-11-21 01:42:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 01:42:01,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:01,622 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, 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] [2021-11-21 01:42:01,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:42:01,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:01,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:01,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1498007888, now seen corresponding path program 1 times [2021-11-21 01:42:01,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:01,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795299663] [2021-11-21 01:42:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:01,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:42:01,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:01,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795299663] [2021-11-21 01:42:01,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795299663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:01,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703266407] [2021-11-21 01:42:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:01,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:01,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:01,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:01,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:42:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:02,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:42:02,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:42:02,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:42:02,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703266407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:02,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:42:02,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 01:42:02,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279386248] [2021-11-21 01:42:02,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:02,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:42:02,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:02,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:42:02,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:02,541 INFO L87 Difference]: Start difference. First operand 1956 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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) [2021-11-21 01:42:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:03,098 INFO L93 Difference]: Finished difference Result 2569 states and 4695 transitions. [2021-11-21 01:42:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:42:03,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 122 [2021-11-21 01:42:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:03,120 INFO L225 Difference]: With dead ends: 2569 [2021-11-21 01:42:03,120 INFO L226 Difference]: Without dead ends: 2259 [2021-11-21 01:42:03,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:03,125 INFO L933 BasicCegarLoop]: 3309 mSDtfsCounter, 3471 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:03,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 3504 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:42:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-11-21 01:42:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2255. [2021-11-21 01:42:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2147 states have (on average 1.8765719608756404) internal successors, (4029), 2151 states have internal predecessors, (4029), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-21 01:42:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4193 transitions. [2021-11-21 01:42:03,239 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4193 transitions. Word has length 122 [2021-11-21 01:42:03,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:03,240 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 4193 transitions. [2021-11-21 01:42:03,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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) [2021-11-21 01:42:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4193 transitions. [2021-11-21 01:42:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 01:42:03,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:03,247 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, 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] [2021-11-21 01:42:03,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:03,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:03,462 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:03,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:03,463 INFO L85 PathProgramCache]: Analyzing trace with hash 765495568, now seen corresponding path program 1 times [2021-11-21 01:42:03,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:03,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442581776] [2021-11-21 01:42:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:03,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:42:03,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:03,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442581776] [2021-11-21 01:42:03,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442581776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:03,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526384043] [2021-11-21 01:42:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:03,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:03,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:03,580 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:03,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:42:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:03,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:42:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 01:42:04,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:42:04,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526384043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:04,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:42:04,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 01:42:04,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386036320] [2021-11-21 01:42:04,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:04,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:42:04,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:04,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:42:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:04,094 INFO L87 Difference]: Start difference. First operand 2255 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-11-21 01:42:04,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:04,688 INFO L93 Difference]: Finished difference Result 3460 states and 6056 transitions. [2021-11-21 01:42:04,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:42:04,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 122 [2021-11-21 01:42:04,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:04,719 INFO L225 Difference]: With dead ends: 3460 [2021-11-21 01:42:04,719 INFO L226 Difference]: Without dead ends: 2851 [2021-11-21 01:42:04,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:04,728 INFO L933 BasicCegarLoop]: 3308 mSDtfsCounter, 3483 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:04,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3483 Valid, 3503 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:42:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-11-21 01:42:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2845. [2021-11-21 01:42:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2639 states have (on average 1.8048503220917014) internal successors, (4763), 2645 states have internal predecessors, (4763), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2021-11-21 01:42:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5075 transitions. [2021-11-21 01:42:04,984 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 5075 transitions. Word has length 122 [2021-11-21 01:42:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:04,984 INFO L470 AbstractCegarLoop]: Abstraction has 2845 states and 5075 transitions. [2021-11-21 01:42:04,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-11-21 01:42:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 5075 transitions. [2021-11-21 01:42:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 01:42:04,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:04,991 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, 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] [2021-11-21 01:42:05,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:05,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:05,205 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:05,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:05,206 INFO L85 PathProgramCache]: Analyzing trace with hash 247614320, now seen corresponding path program 1 times [2021-11-21 01:42:05,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:05,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771448076] [2021-11-21 01:42:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:05,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:42:05,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771448076] [2021-11-21 01:42:05,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771448076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:05,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881852838] [2021-11-21 01:42:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:05,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:05,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:05,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:05,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:42:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:42:05,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:42:05,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:42:05,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881852838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:05,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:42:05,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 01:42:05,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685839251] [2021-11-21 01:42:05,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:05,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:42:05,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:42:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:05,850 INFO L87 Difference]: Start difference. First operand 2845 states and 5075 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-11-21 01:42:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:06,435 INFO L93 Difference]: Finished difference Result 5218 states and 8728 transitions. [2021-11-21 01:42:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:42:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 122 [2021-11-21 01:42:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:06,473 INFO L225 Difference]: With dead ends: 5218 [2021-11-21 01:42:06,473 INFO L226 Difference]: Without dead ends: 4019 [2021-11-21 01:42:06,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:06,484 INFO L933 BasicCegarLoop]: 3296 mSDtfsCounter, 3489 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:06,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3489 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:42:06,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2021-11-21 01:42:06,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4009. [2021-11-21 01:42:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3611 states have (on average 1.7189144281362503) internal successors, (6207), 3621 states have internal predecessors, (6207), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2021-11-21 01:42:06,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6807 transitions. [2021-11-21 01:42:06,715 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6807 transitions. Word has length 122 [2021-11-21 01:42:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:06,716 INFO L470 AbstractCegarLoop]: Abstraction has 4009 states and 6807 transitions. [2021-11-21 01:42:06,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-11-21 01:42:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6807 transitions. [2021-11-21 01:42:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 01:42:06,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:06,727 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, 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] [2021-11-21 01:42:06,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:06,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:06,946 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:06,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:06,946 INFO L85 PathProgramCache]: Analyzing trace with hash 576767440, now seen corresponding path program 1 times [2021-11-21 01:42:06,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:06,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453533227] [2021-11-21 01:42:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:06,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:42:07,036 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:07,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453533227] [2021-11-21 01:42:07,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453533227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:07,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640844132] [2021-11-21 01:42:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:07,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:07,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:07,038 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:07,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:42:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:07,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:42:07,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:42:07,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:42:07,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640844132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:07,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:42:07,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 01:42:07,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071379616] [2021-11-21 01:42:07,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:07,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:42:07,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:07,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:42:07,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:07,540 INFO L87 Difference]: Start difference. First operand 4009 states and 6807 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2021-11-21 01:42:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:08,198 INFO L93 Difference]: Finished difference Result 8686 states and 13972 transitions. [2021-11-21 01:42:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:42:08,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 122 [2021-11-21 01:42:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:08,247 INFO L225 Difference]: With dead ends: 8686 [2021-11-21 01:42:08,247 INFO L226 Difference]: Without dead ends: 6323 [2021-11-21 01:42:08,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:08,262 INFO L933 BasicCegarLoop]: 3306 mSDtfsCounter, 3492 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:08,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3492 Valid, 3501 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:42:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2021-11-21 01:42:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6305. [2021-11-21 01:42:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 5531 states have (on average 1.6356897486892064) internal successors, (9047), 5549 states have internal predecessors, (9047), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2021-11-21 01:42:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 10207 transitions. [2021-11-21 01:42:08,615 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 10207 transitions. Word has length 122 [2021-11-21 01:42:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:08,615 INFO L470 AbstractCegarLoop]: Abstraction has 6305 states and 10207 transitions. [2021-11-21 01:42:08,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2021-11-21 01:42:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 10207 transitions. [2021-11-21 01:42:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 01:42:08,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:08,629 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, 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] [2021-11-21 01:42:08,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:08,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:08,849 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:08,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:08,850 INFO L85 PathProgramCache]: Analyzing trace with hash 967028592, now seen corresponding path program 1 times [2021-11-21 01:42:08,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:08,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420531427] [2021-11-21 01:42:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:08,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:42:08,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:08,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420531427] [2021-11-21 01:42:08,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420531427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:08,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455818829] [2021-11-21 01:42:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:08,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:08,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:08,931 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:08,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:42:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:09,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:42:09,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:42:09,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:42:09,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455818829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:09,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:42:09,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 01:42:09,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092436578] [2021-11-21 01:42:09,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:09,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:42:09,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:42:09,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:09,392 INFO L87 Difference]: Start difference. First operand 6305 states and 10207 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2021-11-21 01:42:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:10,293 INFO L93 Difference]: Finished difference Result 15526 states and 24260 transitions. [2021-11-21 01:42:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:42:10,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 122 [2021-11-21 01:42:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:10,370 INFO L225 Difference]: With dead ends: 15526 [2021-11-21 01:42:10,370 INFO L226 Difference]: Without dead ends: 10867 [2021-11-21 01:42:10,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:10,394 INFO L933 BasicCegarLoop]: 3278 mSDtfsCounter, 3477 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:10,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3477 Valid, 3473 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:42:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2021-11-21 01:42:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10833. [2021-11-21 01:42:10,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9323 states have (on average 1.569344631556366) internal successors, (14631), 9357 states have internal predecessors, (14631), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2021-11-21 01:42:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 16879 transitions. [2021-11-21 01:42:10,887 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 16879 transitions. Word has length 122 [2021-11-21 01:42:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:10,892 INFO L470 AbstractCegarLoop]: Abstraction has 10833 states and 16879 transitions. [2021-11-21 01:42:10,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2021-11-21 01:42:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 16879 transitions. [2021-11-21 01:42:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 01:42:10,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:10,917 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, 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] [2021-11-21 01:42:10,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:11,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6ae75d-a57f-466f-86fa-abc5316e145b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:11,130 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:11,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:11,131 INFO L85 PathProgramCache]: Analyzing trace with hash -27346480, now seen corresponding path program 1 times [2021-11-21 01:42:11,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:11,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740192054] [2021-11-21 01:42:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:11,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:42:11,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:11,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740192054] [2021-11-21 01:42:11,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740192054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:11,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:42:11,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:42:11,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900651953] [2021-11-21 01:42:11,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:11,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:42:11,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:11,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:42:11,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:11,320 INFO L87 Difference]: Start difference. First operand 10833 states and 16879 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:42:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:13,087 INFO L93 Difference]: Finished difference Result 26597 states and 40353 transitions. [2021-11-21 01:42:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:42:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2021-11-21 01:42:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:13,191 INFO L225 Difference]: With dead ends: 26597 [2021-11-21 01:42:13,192 INFO L226 Difference]: Without dead ends: 17411 [2021-11-21 01:42:13,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:42:13,236 INFO L933 BasicCegarLoop]: 3301 mSDtfsCounter, 4030 mSDsluCounter, 10553 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 13095 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:13,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4036 Valid, 13095 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:42:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2021-11-21 01:42:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 15297. [2021-11-21 01:42:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15297 states, 13051 states have (on average 1.5391157765688452) internal successors, (20087), 13101 states have internal predecessors, (20087), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2021-11-21 01:42:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15297 states to 15297 states and 23423 transitions. [2021-11-21 01:42:14,139 INFO L78 Accepts]: Start accepts. Automaton has 15297 states and 23423 transitions. Word has length 122 [2021-11-21 01:42:14,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:14,140 INFO L470 AbstractCegarLoop]: Abstraction has 15297 states and 23423 transitions. [2021-11-21 01:42:14,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:42:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 15297 states and 23423 transitions. [2021-11-21 01:42:14,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-21 01:42:14,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:14,175 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, 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] [2021-11-21 01:42:14,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:42:14,175 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash 778373023, now seen corresponding path program 1 times [2021-11-21 01:42:14,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:14,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647043001] [2021-11-21 01:42:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:14,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:42:14,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:14,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647043001] [2021-11-21 01:42:14,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647043001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:14,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:42:14,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:42:14,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085642795] [2021-11-21 01:42:14,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:14,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:42:14,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:42:14,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:14,346 INFO L87 Difference]: Start difference. First operand 15297 states and 23423 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:42:16,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:16,345 INFO L93 Difference]: Finished difference Result 36973 states and 55793 transitions. [2021-11-21 01:42:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:42:16,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2021-11-21 01:42:16,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:16,647 INFO L225 Difference]: With dead ends: 36973 [2021-11-21 01:42:16,647 INFO L226 Difference]: Without dead ends: 23323 [2021-11-21 01:42:16,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:42:16,691 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 3976 mSDsluCounter, 10418 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3982 SdHoareTripleChecker+Valid, 12953 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:16,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3982 Valid, 12953 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:42:16,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23323 states. [2021-11-21 01:42:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23323 to 21929. [2021-11-21 01:42:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 18587 states have (on average 1.5149835906816593) internal successors, (28159), 18661 states have internal predecessors, (28159), 2476 states have call successors, (2476), 864 states have call predecessors, (2476), 864 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2021-11-21 01:42:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 33111 transitions. [2021-11-21 01:42:18,056 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 33111 transitions. Word has length 123 [2021-11-21 01:42:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:18,058 INFO L470 AbstractCegarLoop]: Abstraction has 21929 states and 33111 transitions. [2021-11-21 01:42:18,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:42:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 33111 transitions. [2021-11-21 01:42:18,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-21 01:42:18,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:18,100 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, 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] [2021-11-21 01:42:18,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:42:18,100 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:18,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:18,101 INFO L85 PathProgramCache]: Analyzing trace with hash -901284940, now seen corresponding path program 1 times [2021-11-21 01:42:18,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:18,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180933585] [2021-11-21 01:42:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:18,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:42:18,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:18,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180933585] [2021-11-21 01:42:18,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180933585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:18,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:42:18,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:42:18,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093678503] [2021-11-21 01:42:18,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:18,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:42:18,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:18,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:42:18,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:18,243 INFO L87 Difference]: Start difference. First operand 21929 states and 33111 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:42:20,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:20,835 INFO L93 Difference]: Finished difference Result 72237 states and 107490 transitions. [2021-11-21 01:42:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:42:20,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2021-11-21 01:42:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:21,114 INFO L225 Difference]: With dead ends: 72237 [2021-11-21 01:42:21,114 INFO L226 Difference]: Without dead ends: 51955 [2021-11-21 01:42:21,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:42:21,181 INFO L933 BasicCegarLoop]: 3283 mSDtfsCounter, 4216 mSDsluCounter, 7008 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4235 SdHoareTripleChecker+Valid, 9787 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:21,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4235 Valid, 9787 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:42:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2021-11-21 01:42:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 41345. [2021-11-21 01:42:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41345 states, 34811 states have (on average 1.4866277900663583) internal successors, (51751), 34957 states have internal predecessors, (51751), 4804 states have call successors, (4804), 1728 states have call predecessors, (4804), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2021-11-21 01:42:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41345 states to 41345 states and 61359 transitions. [2021-11-21 01:42:23,482 INFO L78 Accepts]: Start accepts. Automaton has 41345 states and 61359 transitions. Word has length 124 [2021-11-21 01:42:23,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:23,483 INFO L470 AbstractCegarLoop]: Abstraction has 41345 states and 61359 transitions. [2021-11-21 01:42:23,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:42:23,483 INFO L276 IsEmpty]: Start isEmpty. Operand 41345 states and 61359 transitions. [2021-11-21 01:42:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-21 01:42:23,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:23,570 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, 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] [2021-11-21 01:42:23,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:42:23,570 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:23,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1833961287, now seen corresponding path program 1 times [2021-11-21 01:42:23,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:23,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536809447] [2021-11-21 01:42:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:23,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:42:23,724 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:23,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536809447] [2021-11-21 01:42:23,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536809447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:23,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:42:23,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:42:23,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091358819] [2021-11-21 01:42:23,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:23,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:42:23,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:23,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:42:23,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:23,729 INFO L87 Difference]: Start difference. First operand 41345 states and 61359 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:42:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:27,850 INFO L93 Difference]: Finished difference Result 108861 states and 161033 transitions. [2021-11-21 01:42:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:42:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2021-11-21 01:42:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:28,208 INFO L225 Difference]: With dead ends: 108861 [2021-11-21 01:42:28,208 INFO L226 Difference]: Without dead ends: 69163 [2021-11-21 01:42:28,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:42:28,331 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 4039 mSDsluCounter, 10490 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4045 SdHoareTripleChecker+Valid, 13013 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:28,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4045 Valid, 13013 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:42:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69163 states. [2021-11-21 01:42:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69163 to 60617. [2021-11-21 01:42:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60617 states, 50891 states have (on average 1.4734039417578746) internal successors, (74983), 51109 states have internal predecessors, (74983), 7132 states have call successors, (7132), 2592 states have call predecessors, (7132), 2592 states have return successors, (7132), 6916 states have call predecessors, (7132), 7132 states have call successors, (7132) [2021-11-21 01:42:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60617 states to 60617 states and 89247 transitions. [2021-11-21 01:42:32,464 INFO L78 Accepts]: Start accepts. Automaton has 60617 states and 89247 transitions. Word has length 125 [2021-11-21 01:42:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:32,464 INFO L470 AbstractCegarLoop]: Abstraction has 60617 states and 89247 transitions. [2021-11-21 01:42:32,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:42:32,465 INFO L276 IsEmpty]: Start isEmpty. Operand 60617 states and 89247 transitions. [2021-11-21 01:42:32,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-21 01:42:32,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:32,550 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, 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] [2021-11-21 01:42:32,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:42:32,551 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:32,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:32,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1530163724, now seen corresponding path program 1 times [2021-11-21 01:42:32,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:32,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225335938] [2021-11-21 01:42:32,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:32,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:42:32,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:32,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225335938] [2021-11-21 01:42:32,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225335938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:32,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:42:32,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:42:32,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894210789] [2021-11-21 01:42:32,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:32,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:42:32,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:32,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:42:32,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:32,704 INFO L87 Difference]: Start difference. First operand 60617 states and 89247 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:42:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:39,841 INFO L93 Difference]: Finished difference Result 198141 states and 291642 transitions. [2021-11-21 01:42:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:42:39,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2021-11-21 01:42:39,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:40,756 INFO L225 Difference]: With dead ends: 198141 [2021-11-21 01:42:40,756 INFO L226 Difference]: Without dead ends: 139171 [2021-11-21 01:42:40,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:42:40,934 INFO L933 BasicCegarLoop]: 3265 mSDtfsCounter, 4087 mSDsluCounter, 10368 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4106 SdHoareTripleChecker+Valid, 12898 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:40,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4106 Valid, 12898 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:42:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139171 states. [2021-11-21 01:42:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139171 to 116993. [2021-11-21 01:42:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116993 states, 97979 states have (on average 1.4575266128456097) internal successors, (142807), 98413 states have internal predecessors, (142807), 13828 states have call successors, (13828), 5184 states have call predecessors, (13828), 5184 states have return successors, (13828), 13396 states have call predecessors, (13828), 13828 states have call successors, (13828) [2021-11-21 01:42:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116993 states to 116993 states and 170463 transitions. [2021-11-21 01:42:47,678 INFO L78 Accepts]: Start accepts. Automaton has 116993 states and 170463 transitions. Word has length 126 [2021-11-21 01:42:47,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:47,678 INFO L470 AbstractCegarLoop]: Abstraction has 116993 states and 170463 transitions. [2021-11-21 01:42:47,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 01:42:47,679 INFO L276 IsEmpty]: Start isEmpty. Operand 116993 states and 170463 transitions. [2021-11-21 01:42:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-21 01:42:47,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:47,835 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, 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] [2021-11-21 01:42:47,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:42:47,835 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:47,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1023392021, now seen corresponding path program 1 times [2021-11-21 01:42:47,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:47,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240018186] [2021-11-21 01:42:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:47,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:42:47,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:47,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240018186] [2021-11-21 01:42:47,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240018186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:47,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:42:47,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:42:47,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728014003] [2021-11-21 01:42:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:47,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:42:47,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:42:47,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:42:47,998 INFO L87 Difference]: Start difference. First operand 116993 states and 170463 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)