./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba --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 7334648c93226b30578843a7fb29bf568bbbf46b83ab126a034690ad505a2960 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:17:42,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:17:42,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:17:43,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:17:43,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:17:43,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:17:43,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:17:43,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:17:43,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:17:43,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:17:43,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:17:43,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:17:43,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:17:43,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:17:43,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:17:43,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:17:43,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:17:43,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:17:43,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:17:43,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:17:43,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:17:43,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:17:43,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:17:43,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:17:43,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:17:43,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:17:43,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:17:43,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:17:43,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:17:43,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:17:43,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:17:43,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:17:43,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:17:43,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:17:43,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:17:43,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:17:43,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:17:43,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:17:43,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:17:43,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:17:43,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:17:43,092 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:17:43,115 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:17:43,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:17:43,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:17:43,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:17:43,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:17:43,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:17:43,117 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:17:43,117 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:17:43,118 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:17:43,118 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:17:43,118 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:17:43,118 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:17:43,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:17:43,119 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:17:43,119 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:17:43,119 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:17:43,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:17:43,119 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:17:43,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:17:43,120 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:17:43,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:17:43,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:17:43,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:17:43,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:17:43,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:17:43,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:17:43,122 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:17:43,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:17:43,122 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:17:43,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:17:43,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:17:43,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:17:43,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:17:43,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:17:43,124 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:17:43,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:17:43,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:17:43,124 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:17:43,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:17:43,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:17:43,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:17:43,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7334648c93226b30578843a7fb29bf568bbbf46b83ab126a034690ad505a2960 [2022-11-22 00:17:43,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:17:43,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:17:43,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:17:43,429 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:17:43,430 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:17:43,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 00:17:46,575 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:17:46,823 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:17:46,824 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 00:17:46,833 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/data/92757f516/b33c901f30474c28886fd07e1321ab4b/FLAG14994ce4b [2022-11-22 00:17:46,849 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/data/92757f516/b33c901f30474c28886fd07e1321ab4b [2022-11-22 00:17:46,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:17:46,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:17:46,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:17:46,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:17:46,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:17:46,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:17:46" (1/1) ... [2022-11-22 00:17:46,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32054fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:46, skipping insertion in model container [2022-11-22 00:17:46,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:17:46" (1/1) ... [2022-11-22 00:17:46,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:17:46,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:17:47,112 WARN L237 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_83707ecd-9609-4037-8aa0-bb5aa459ab84/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6730,6743] [2022-11-22 00:17:47,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:17:47,165 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:17:47,214 WARN L237 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_83707ecd-9609-4037-8aa0-bb5aa459ab84/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6730,6743] [2022-11-22 00:17:47,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:17:47,257 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:17:47,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47 WrapperNode [2022-11-22 00:17:47,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:17:47,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:17:47,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:17:47,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:17:47,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (1/1) ... [2022-11-22 00:17:47,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (1/1) ... [2022-11-22 00:17:47,326 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 491 [2022-11-22 00:17:47,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:17:47,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:17:47,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:17:47,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:17:47,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (1/1) ... [2022-11-22 00:17:47,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (1/1) ... [2022-11-22 00:17:47,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (1/1) ... [2022-11-22 00:17:47,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (1/1) ... [2022-11-22 00:17:47,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (1/1) ... [2022-11-22 00:17:47,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (1/1) ... [2022-11-22 00:17:47,381 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (1/1) ... [2022-11-22 00:17:47,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (1/1) ... [2022-11-22 00:17:47,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:17:47,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:17:47,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:17:47,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:17:47,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (1/1) ... [2022-11-22 00:17:47,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:17:47,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:17:47,468 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:17:47,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:17:47,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:17:47,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:17:47,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:17:47,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:17:47,704 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:17:47,721 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:17:48,206 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:17:48,374 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:17:48,374 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 00:17:48,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:17:48 BoogieIcfgContainer [2022-11-22 00:17:48,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:17:48,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:17:48,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:17:48,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:17:48,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:17:46" (1/3) ... [2022-11-22 00:17:48,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d1669f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:17:48, skipping insertion in model container [2022-11-22 00:17:48,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:17:47" (2/3) ... [2022-11-22 00:17:48,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d1669f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:17:48, skipping insertion in model container [2022-11-22 00:17:48,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:17:48" (3/3) ... [2022-11-22 00:17:48,393 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 00:17:48,412 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:17:48,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:17:48,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:17:48,490 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@780e81d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:17:48,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:17:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 87 states have (on average 1.735632183908046) internal successors, (151), 88 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-22 00:17:48,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:48,504 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:17:48,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:48,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:48,510 INFO L85 PathProgramCache]: Analyzing trace with hash -100914670, now seen corresponding path program 1 times [2022-11-22 00:17:48,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:48,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535656453] [2022-11-22 00:17:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:48,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:49,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:49,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535656453] [2022-11-22 00:17:49,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535656453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:49,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:17:49,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:17:49,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890932801] [2022-11-22 00:17:49,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:49,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:17:49,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:49,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:17:49,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:49,164 INFO L87 Difference]: Start difference. First operand has 89 states, 87 states have (on average 1.735632183908046) internal successors, (151), 88 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:49,322 INFO L93 Difference]: Finished difference Result 179 states and 281 transitions. [2022-11-22 00:17:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:17:49,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-22 00:17:49,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:49,335 INFO L225 Difference]: With dead ends: 179 [2022-11-22 00:17:49,336 INFO L226 Difference]: Without dead ends: 128 [2022-11-22 00:17:49,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:49,344 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 100 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:49,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 251 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:17:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-22 00:17:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-11-22 00:17:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.328) internal successors, (166), 125 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2022-11-22 00:17:49,427 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 59 [2022-11-22 00:17:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:49,428 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2022-11-22 00:17:49,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2022-11-22 00:17:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 00:17:49,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:49,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:49,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:17:49,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash 287066225, now seen corresponding path program 1 times [2022-11-22 00:17:49,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:49,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93913620] [2022-11-22 00:17:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:49,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:49,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:49,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93913620] [2022-11-22 00:17:49,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93913620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:49,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:17:49,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:17:49,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65945747] [2022-11-22 00:17:49,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:49,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:17:49,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:49,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:17:49,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:49,630 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:49,742 INFO L93 Difference]: Finished difference Result 286 states and 402 transitions. [2022-11-22 00:17:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:17:49,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-22 00:17:49,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:49,748 INFO L225 Difference]: With dead ends: 286 [2022-11-22 00:17:49,749 INFO L226 Difference]: Without dead ends: 202 [2022-11-22 00:17:49,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:49,755 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 58 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:49,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 202 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:17:49,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-22 00:17:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-11-22 00:17:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.3819095477386936) internal successors, (275), 199 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 275 transitions. [2022-11-22 00:17:49,806 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 275 transitions. Word has length 62 [2022-11-22 00:17:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:49,808 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 275 transitions. [2022-11-22 00:17:49,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:49,809 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 275 transitions. [2022-11-22 00:17:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 00:17:49,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:49,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:49,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:17:49,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 632418467, now seen corresponding path program 1 times [2022-11-22 00:17:49,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:49,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186621307] [2022-11-22 00:17:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:49,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:49,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:49,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186621307] [2022-11-22 00:17:49,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186621307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:49,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:17:49,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:17:49,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136829278] [2022-11-22 00:17:49,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:49,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:17:49,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:17:49,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:49,948 INFO L87 Difference]: Start difference. First operand 200 states and 275 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:50,031 INFO L93 Difference]: Finished difference Result 500 states and 717 transitions. [2022-11-22 00:17:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:17:50,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-22 00:17:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:50,035 INFO L225 Difference]: With dead ends: 500 [2022-11-22 00:17:50,035 INFO L226 Difference]: Without dead ends: 342 [2022-11-22 00:17:50,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:50,037 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 53 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:50,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 198 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:17:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-22 00:17:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 340. [2022-11-22 00:17:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.4129793510324484) internal successors, (479), 339 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 479 transitions. [2022-11-22 00:17:50,090 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 479 transitions. Word has length 65 [2022-11-22 00:17:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:50,090 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 479 transitions. [2022-11-22 00:17:50,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 479 transitions. [2022-11-22 00:17:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 00:17:50,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:50,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:50,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:17:50,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:50,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1447259124, now seen corresponding path program 1 times [2022-11-22 00:17:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:50,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410095649] [2022-11-22 00:17:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:50,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:50,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:50,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410095649] [2022-11-22 00:17:50,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410095649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:50,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:17:50,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:17:50,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851489344] [2022-11-22 00:17:50,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:50,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:17:50,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:17:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:50,183 INFO L87 Difference]: Start difference. First operand 340 states and 479 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:50,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:50,340 INFO L93 Difference]: Finished difference Result 904 states and 1305 transitions. [2022-11-22 00:17:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:17:50,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-22 00:17:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:50,344 INFO L225 Difference]: With dead ends: 904 [2022-11-22 00:17:50,344 INFO L226 Difference]: Without dead ends: 606 [2022-11-22 00:17:50,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:50,358 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 48 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:50,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 194 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:17:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-22 00:17:50,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 604. [2022-11-22 00:17:50,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.4245439469320067) internal successors, (859), 603 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 859 transitions. [2022-11-22 00:17:50,480 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 859 transitions. Word has length 68 [2022-11-22 00:17:50,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:50,483 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 859 transitions. [2022-11-22 00:17:50,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 859 transitions. [2022-11-22 00:17:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 00:17:50,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:50,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:50,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:17:50,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:50,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1920399049, now seen corresponding path program 1 times [2022-11-22 00:17:50,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:50,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576851242] [2022-11-22 00:17:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:50,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:50,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:50,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576851242] [2022-11-22 00:17:50,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576851242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:50,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:17:50,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:17:50,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609017061] [2022-11-22 00:17:50,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:50,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:17:50,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:50,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:17:50,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:50,624 INFO L87 Difference]: Start difference. First operand 604 states and 859 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:50,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:50,907 INFO L93 Difference]: Finished difference Result 1664 states and 2397 transitions. [2022-11-22 00:17:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:17:50,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-22 00:17:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:50,914 INFO L225 Difference]: With dead ends: 1664 [2022-11-22 00:17:50,914 INFO L226 Difference]: Without dead ends: 1102 [2022-11-22 00:17:50,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:50,918 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 43 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:50,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 190 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:17:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-11-22 00:17:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1100. [2022-11-22 00:17:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 1.4222020018198362) internal successors, (1563), 1099 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1563 transitions. [2022-11-22 00:17:51,103 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1563 transitions. Word has length 71 [2022-11-22 00:17:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:51,104 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1563 transitions. [2022-11-22 00:17:51,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1563 transitions. [2022-11-22 00:17:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 00:17:51,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:51,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:51,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:17:51,111 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:51,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1470099092, now seen corresponding path program 1 times [2022-11-22 00:17:51,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:51,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849858050] [2022-11-22 00:17:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:51,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:51,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:51,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849858050] [2022-11-22 00:17:51,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849858050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:51,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:17:51,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:17:51,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787738171] [2022-11-22 00:17:51,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:51,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:17:51,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:51,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:17:51,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:51,247 INFO L87 Difference]: Start difference. First operand 1100 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:51,683 INFO L93 Difference]: Finished difference Result 3088 states and 4413 transitions. [2022-11-22 00:17:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:17:51,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-22 00:17:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:51,691 INFO L225 Difference]: With dead ends: 3088 [2022-11-22 00:17:51,691 INFO L226 Difference]: Without dead ends: 2030 [2022-11-22 00:17:51,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:51,694 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 38 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:51,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 186 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:17:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2022-11-22 00:17:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 2028. [2022-11-22 00:17:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 1.4104588061174148) internal successors, (2859), 2027 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2859 transitions. [2022-11-22 00:17:52,061 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2859 transitions. Word has length 74 [2022-11-22 00:17:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:52,061 INFO L495 AbstractCegarLoop]: Abstraction has 2028 states and 2859 transitions. [2022-11-22 00:17:52,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:52,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2859 transitions. [2022-11-22 00:17:52,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-22 00:17:52,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:52,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:52,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:17:52,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:52,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:52,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1217345009, now seen corresponding path program 1 times [2022-11-22 00:17:52,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:52,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881602488] [2022-11-22 00:17:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:52,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:52,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:52,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881602488] [2022-11-22 00:17:52,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881602488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:52,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:17:52,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 00:17:52,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781285687] [2022-11-22 00:17:52,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:52,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:17:52,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:52,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:17:52,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:17:52,370 INFO L87 Difference]: Start difference. First operand 2028 states and 2859 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:53,844 INFO L93 Difference]: Finished difference Result 8258 states and 11740 transitions. [2022-11-22 00:17:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 00:17:53,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-22 00:17:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:53,868 INFO L225 Difference]: With dead ends: 8258 [2022-11-22 00:17:53,868 INFO L226 Difference]: Without dead ends: 6272 [2022-11-22 00:17:53,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:17:53,877 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 809 mSDsluCounter, 2037 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:53,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 2134 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:17:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6272 states. [2022-11-22 00:17:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6272 to 2728. [2022-11-22 00:17:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2727 states have (on average 1.3986065273193986) internal successors, (3814), 2727 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 3814 transitions. [2022-11-22 00:17:54,458 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 3814 transitions. Word has length 77 [2022-11-22 00:17:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:54,459 INFO L495 AbstractCegarLoop]: Abstraction has 2728 states and 3814 transitions. [2022-11-22 00:17:54,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 3814 transitions. [2022-11-22 00:17:54,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-22 00:17:54,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:54,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:54,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:17:54,461 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:54,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:54,462 INFO L85 PathProgramCache]: Analyzing trace with hash 723822106, now seen corresponding path program 1 times [2022-11-22 00:17:54,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:54,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178808558] [2022-11-22 00:17:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:54,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:54,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:54,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178808558] [2022-11-22 00:17:54,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178808558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:54,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:17:54,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:17:54,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871079774] [2022-11-22 00:17:54,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:54,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:17:54,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:54,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:17:54,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:54,605 INFO L87 Difference]: Start difference. First operand 2728 states and 3814 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:55,387 INFO L93 Difference]: Finished difference Result 6982 states and 9840 transitions. [2022-11-22 00:17:55,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:17:55,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-22 00:17:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:55,404 INFO L225 Difference]: With dead ends: 6982 [2022-11-22 00:17:55,404 INFO L226 Difference]: Without dead ends: 4296 [2022-11-22 00:17:55,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:55,410 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 32 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:55,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 157 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:17:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2022-11-22 00:17:56,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4294. [2022-11-22 00:17:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.4055439086885628) internal successors, (6034), 4293 states have internal predecessors, (6034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:56,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 6034 transitions. [2022-11-22 00:17:56,267 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 6034 transitions. Word has length 79 [2022-11-22 00:17:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:56,267 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 6034 transitions. [2022-11-22 00:17:56,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 6034 transitions. [2022-11-22 00:17:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-22 00:17:56,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:56,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:56,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:17:56,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:56,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:56,270 INFO L85 PathProgramCache]: Analyzing trace with hash 736632236, now seen corresponding path program 1 times [2022-11-22 00:17:56,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:56,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437893780] [2022-11-22 00:17:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:56,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:56,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:56,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437893780] [2022-11-22 00:17:56,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437893780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:56,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:17:56,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 00:17:56,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066329069] [2022-11-22 00:17:56,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:56,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:17:56,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:56,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:17:56,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:17:56,665 INFO L87 Difference]: Start difference. First operand 4294 states and 6034 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:57,658 INFO L93 Difference]: Finished difference Result 8546 states and 12025 transitions. [2022-11-22 00:17:57,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:17:57,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-22 00:17:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:57,672 INFO L225 Difference]: With dead ends: 8546 [2022-11-22 00:17:57,673 INFO L226 Difference]: Without dead ends: 4296 [2022-11-22 00:17:57,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:17:57,679 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 400 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:57,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 418 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:17:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2022-11-22 00:17:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4294. [2022-11-22 00:17:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.4050780340088516) internal successors, (6032), 4293 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 6032 transitions. [2022-11-22 00:17:58,378 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 6032 transitions. Word has length 79 [2022-11-22 00:17:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:58,378 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 6032 transitions. [2022-11-22 00:17:58,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 6032 transitions. [2022-11-22 00:17:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 00:17:58,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:58,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:58,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:17:58,380 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:58,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1367046049, now seen corresponding path program 1 times [2022-11-22 00:17:58,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:58,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985315852] [2022-11-22 00:17:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:58,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:58,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985315852] [2022-11-22 00:17:58,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985315852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:58,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:17:58,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:17:58,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272167574] [2022-11-22 00:17:58,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:58,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:17:58,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:58,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:17:58,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:17:58,532 INFO L87 Difference]: Start difference. First operand 4294 states and 6032 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:59,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:59,419 INFO L93 Difference]: Finished difference Result 8544 states and 12020 transitions. [2022-11-22 00:17:59,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:17:59,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-22 00:17:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:59,436 INFO L225 Difference]: With dead ends: 8544 [2022-11-22 00:17:59,437 INFO L226 Difference]: Without dead ends: 4294 [2022-11-22 00:17:59,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:17:59,444 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 244 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:59,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 82 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:17:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2022-11-22 00:18:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4294. [2022-11-22 00:18:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3901700442580947) internal successors, (5968), 4293 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5968 transitions. [2022-11-22 00:18:00,218 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5968 transitions. Word has length 80 [2022-11-22 00:18:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:00,218 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5968 transitions. [2022-11-22 00:18:00,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:00,219 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5968 transitions. [2022-11-22 00:18:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 00:18:00,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:00,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:00,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 00:18:00,220 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:18:00,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:00,221 INFO L85 PathProgramCache]: Analyzing trace with hash 604182342, now seen corresponding path program 1 times [2022-11-22 00:18:00,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:00,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801079648] [2022-11-22 00:18:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:00,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:00,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:00,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801079648] [2022-11-22 00:18:00,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801079648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:00,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:00,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:18:00,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437207083] [2022-11-22 00:18:00,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:00,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:18:00,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:00,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:18:00,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:18:00,332 INFO L87 Difference]: Start difference. First operand 4294 states and 5968 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:01,017 INFO L93 Difference]: Finished difference Result 8544 states and 11892 transitions. [2022-11-22 00:18:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:18:01,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-22 00:18:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:01,045 INFO L225 Difference]: With dead ends: 8544 [2022-11-22 00:18:01,045 INFO L226 Difference]: Without dead ends: 4294 [2022-11-22 00:18:01,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:18:01,052 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 215 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:01,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 98 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2022-11-22 00:18:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4294. [2022-11-22 00:18:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3780573025856044) internal successors, (5916), 4293 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5916 transitions. [2022-11-22 00:18:01,663 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5916 transitions. Word has length 80 [2022-11-22 00:18:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:01,663 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5916 transitions. [2022-11-22 00:18:01,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5916 transitions. [2022-11-22 00:18:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 00:18:01,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:01,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:01,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 00:18:01,665 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:18:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:01,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1469714731, now seen corresponding path program 1 times [2022-11-22 00:18:01,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:01,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117622549] [2022-11-22 00:18:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:01,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:01,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:01,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117622549] [2022-11-22 00:18:01,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117622549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:01,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:01,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:18:01,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314444041] [2022-11-22 00:18:01,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:18:01,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:18:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:18:01,781 INFO L87 Difference]: Start difference. First operand 4294 states and 5916 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:02,855 INFO L93 Difference]: Finished difference Result 8544 states and 11788 transitions. [2022-11-22 00:18:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:18:02,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-22 00:18:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:02,865 INFO L225 Difference]: With dead ends: 8544 [2022-11-22 00:18:02,865 INFO L226 Difference]: Without dead ends: 4294 [2022-11-22 00:18:02,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:18:02,872 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 225 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:02,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 90 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2022-11-22 00:18:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4294. [2022-11-22 00:18:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3650128115536921) internal successors, (5860), 4293 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5860 transitions. [2022-11-22 00:18:03,535 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5860 transitions. Word has length 80 [2022-11-22 00:18:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:03,535 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5860 transitions. [2022-11-22 00:18:03,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5860 transitions. [2022-11-22 00:18:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 00:18:03,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:03,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 00:18:03,537 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:18:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1597800038, now seen corresponding path program 1 times [2022-11-22 00:18:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:03,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305640138] [2022-11-22 00:18:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:03,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:03,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:03,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305640138] [2022-11-22 00:18:03,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305640138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:03,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:03,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:18:03,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859623835] [2022-11-22 00:18:03,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:03,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:18:03,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:03,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:18:03,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:18:03,663 INFO L87 Difference]: Start difference. First operand 4294 states and 5860 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:04,664 INFO L93 Difference]: Finished difference Result 8544 states and 11676 transitions. [2022-11-22 00:18:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:18:04,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-22 00:18:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:04,688 INFO L225 Difference]: With dead ends: 8544 [2022-11-22 00:18:04,688 INFO L226 Difference]: Without dead ends: 4294 [2022-11-22 00:18:04,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:18:04,694 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 248 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:04,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 74 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:04,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2022-11-22 00:18:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4294. [2022-11-22 00:18:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3463778243652458) internal successors, (5780), 4293 states have internal predecessors, (5780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5780 transitions. [2022-11-22 00:18:05,704 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5780 transitions. Word has length 80 [2022-11-22 00:18:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:05,705 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5780 transitions. [2022-11-22 00:18:05,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5780 transitions. [2022-11-22 00:18:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 00:18:05,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:05,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:05,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 00:18:05,706 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:18:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:05,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1966071265, now seen corresponding path program 1 times [2022-11-22 00:18:05,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:05,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668532650] [2022-11-22 00:18:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:06,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:06,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668532650] [2022-11-22 00:18:06,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668532650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:06,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:06,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:18:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159451293] [2022-11-22 00:18:06,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:06,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:18:06,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:06,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:18:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:18:06,047 INFO L87 Difference]: Start difference. First operand 4294 states and 5780 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:07,648 INFO L93 Difference]: Finished difference Result 5843 states and 7782 transitions. [2022-11-22 00:18:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:18:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-22 00:18:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:07,658 INFO L225 Difference]: With dead ends: 5843 [2022-11-22 00:18:07,658 INFO L226 Difference]: Without dead ends: 5841 [2022-11-22 00:18:07,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:18:07,662 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 148 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:07,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 611 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2022-11-22 00:18:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 4294. [2022-11-22 00:18:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3389238294898673) internal successors, (5748), 4293 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5748 transitions. [2022-11-22 00:18:08,792 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5748 transitions. Word has length 80 [2022-11-22 00:18:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:08,792 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5748 transitions. [2022-11-22 00:18:08,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5748 transitions. [2022-11-22 00:18:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-22 00:18:08,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:08,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:08,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 00:18:08,795 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:18:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash -307880148, now seen corresponding path program 1 times [2022-11-22 00:18:08,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:08,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791646251] [2022-11-22 00:18:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:08,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:23,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:23,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791646251] [2022-11-22 00:18:23,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791646251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:23,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413664246] [2022-11-22 00:18:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:23,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:23,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:23,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:23,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83707ecd-9609-4037-8aa0-bb5aa459ab84/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:18:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:24,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-22 00:18:24,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:55,439 INFO L328 TraceCheckSpWp]: Computing backward predicates...