./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label07.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW --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 a8eb1c549e735c3cffa39c2cb57907d032185b5da86f8481f430bf75e1d2a903 --- 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-4e7fbc6 [2022-11-23 15:39:34,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:39:34,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:39:35,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:39:35,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:39:35,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:39:35,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:39:35,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:39:35,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:39:35,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:39:35,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:39:35,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:39:35,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:39:35,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:39:35,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:39:35,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:39:35,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:39:35,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:39:35,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:39:35,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:39:35,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:39:35,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:39:35,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:39:35,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:39:35,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:39:35,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:39:35,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:39:35,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:39:35,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:39:35,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:39:35,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:39:35,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:39:35,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:39:35,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:39:35,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:39:35,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:39:35,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:39:35,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:39:35,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:39:35,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:39:35,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:39:35,072 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:39:35,096 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:39:35,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:39:35,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:39:35,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:39:35,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:39:35,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:39:35,099 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:39:35,099 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:39:35,099 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:39:35,099 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:39:35,100 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:39:35,100 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:39:35,100 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:39:35,100 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:39:35,101 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:39:35,101 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:39:35,101 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:39:35,101 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:39:35,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:39:35,102 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:39:35,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:39:35,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:39:35,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:39:35,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:39:35,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:39:35,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:39:35,104 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:39:35,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:39:35,105 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:39:35,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:39:35,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:39:35,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:39:35,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:39:35,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:39:35,106 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:39:35,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:39:35,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:39:35,107 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:39:35,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:39:35,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:39:35,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:39:35,108 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_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8eb1c549e735c3cffa39c2cb57907d032185b5da86f8481f430bf75e1d2a903 [2022-11-23 15:39:35,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:39:35,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:39:35,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:39:35,404 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:39:35,405 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:39:35,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2022-11-23 15:39:38,679 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:39:39,195 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:39:39,196 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2022-11-23 15:39:39,216 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/data/fce9b9a85/79083bbafad442428f78d18dace8bb37/FLAGc476acd88 [2022-11-23 15:39:39,239 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/data/fce9b9a85/79083bbafad442428f78d18dace8bb37 [2022-11-23 15:39:39,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:39:39,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:39:39,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:39:39,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:39:39,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:39:39,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:39:39" (1/1) ... [2022-11-23 15:39:39,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1822db77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:39, skipping insertion in model container [2022-11-23 15:39:39,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:39:39" (1/1) ... [2022-11-23 15:39:39,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:39:39,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:39:40,078 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_9c2c1f75-ba1c-4965-9bcd-130f781b4776/sv-benchmarks/c/eca-rers2012/Problem03_label07.c[57439,57452] [2022-11-23 15:39:40,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:39:40,159 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:39:40,479 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_9c2c1f75-ba1c-4965-9bcd-130f781b4776/sv-benchmarks/c/eca-rers2012/Problem03_label07.c[57439,57452] [2022-11-23 15:39:40,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:39:40,513 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:39:40,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40 WrapperNode [2022-11-23 15:39:40,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:39:40,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:39:40,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:39:40,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:39:40,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (1/1) ... [2022-11-23 15:39:40,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (1/1) ... [2022-11-23 15:39:40,671 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-23 15:39:40,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:39:40,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:39:40,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:39:40,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:39:40,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (1/1) ... [2022-11-23 15:39:40,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (1/1) ... [2022-11-23 15:39:40,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (1/1) ... [2022-11-23 15:39:40,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (1/1) ... [2022-11-23 15:39:40,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (1/1) ... [2022-11-23 15:39:40,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (1/1) ... [2022-11-23 15:39:40,883 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (1/1) ... [2022-11-23 15:39:40,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (1/1) ... [2022-11-23 15:39:40,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:39:40,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:39:40,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:39:40,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:39:40,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (1/1) ... [2022-11-23 15:39:40,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:39:40,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:39:40,999 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:39:41,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:39:41,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:39:41,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:39:41,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:39:41,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:39:41,134 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:39:41,136 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:39:43,395 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:39:43,673 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:39:43,674 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:39:43,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:39:43 BoogieIcfgContainer [2022-11-23 15:39:43,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:39:43,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:39:43,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:39:43,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:39:43,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:39:39" (1/3) ... [2022-11-23 15:39:43,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6692ac69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:39:43, skipping insertion in model container [2022-11-23 15:39:43,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:40" (2/3) ... [2022-11-23 15:39:43,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6692ac69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:39:43, skipping insertion in model container [2022-11-23 15:39:43,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:39:43" (3/3) ... [2022-11-23 15:39:43,686 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label07.c [2022-11-23 15:39:43,707 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:39:43,707 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:39:43,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:39:43,771 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;@692f47da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:39:43,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:39:43,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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) [2022-11-23 15:39:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 15:39:43,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:39:43,791 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:39:43,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:39:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:39:43,798 INFO L85 PathProgramCache]: Analyzing trace with hash 209344183, now seen corresponding path program 1 times [2022-11-23 15:39:43,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:39:43,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848423833] [2022-11-23 15:39:43,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:39:43,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:39:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:39:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:39:44,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:39:44,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848423833] [2022-11-23 15:39:44,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848423833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:39:44,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:39:44,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:39:44,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214362254] [2022-11-23 15:39:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:39:44,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:39:44,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:39:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:39:44,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:44,766 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-11-23 15:39:45,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:39:45,851 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-23 15:39:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:39:45,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2022-11-23 15:39:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:39:45,867 INFO L225 Difference]: With dead ends: 440 [2022-11-23 15:39:45,867 INFO L226 Difference]: Without dead ends: 289 [2022-11-23 15:39:45,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:45,875 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:39:45,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 57 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:39:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-23 15:39:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-23 15:39:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.9270833333333333) internal successors, (555), 288 states have internal predecessors, (555), 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) [2022-11-23 15:39:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 555 transitions. [2022-11-23 15:39:45,945 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 555 transitions. Word has length 143 [2022-11-23 15:39:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:39:45,946 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 555 transitions. [2022-11-23 15:39:45,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-11-23 15:39:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 555 transitions. [2022-11-23 15:39:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 15:39:45,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:39:45,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:39:45,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:39:45,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:39:45,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:39:45,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1305709099, now seen corresponding path program 1 times [2022-11-23 15:39:45,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:39:45,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277086567] [2022-11-23 15:39:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:39:45,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:39:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:39:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:39:46,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:39:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277086567] [2022-11-23 15:39:46,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277086567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:39:46,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:39:46,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:39:46,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908488644] [2022-11-23 15:39:46,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:39:46,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:39:46,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:39:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:39:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:46,425 INFO L87 Difference]: Start difference. First operand 289 states and 555 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2022-11-23 15:39:47,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:39:47,326 INFO L93 Difference]: Finished difference Result 865 states and 1663 transitions. [2022-11-23 15:39:47,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:39:47,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 147 [2022-11-23 15:39:47,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:39:47,330 INFO L225 Difference]: With dead ends: 865 [2022-11-23 15:39:47,330 INFO L226 Difference]: Without dead ends: 577 [2022-11-23 15:39:47,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:47,333 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 180 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:39:47,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 16 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:39:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-23 15:39:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2022-11-23 15:39:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.8954703832752613) internal successors, (1088), 574 states have internal predecessors, (1088), 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) [2022-11-23 15:39:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1088 transitions. [2022-11-23 15:39:47,386 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1088 transitions. Word has length 147 [2022-11-23 15:39:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:39:47,386 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1088 transitions. [2022-11-23 15:39:47,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2022-11-23 15:39:47,387 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1088 transitions. [2022-11-23 15:39:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-23 15:39:47,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:39:47,392 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:39:47,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:39:47,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:39:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:39:47,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1322620065, now seen corresponding path program 1 times [2022-11-23 15:39:47,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:39:47,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813373368] [2022-11-23 15:39:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:39:47,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:39:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:39:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:39:47,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:39:47,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813373368] [2022-11-23 15:39:47,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813373368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:39:47,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:39:47,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:39:47,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339865811] [2022-11-23 15:39:47,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:39:47,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:39:47,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:39:47,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:39:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:47,673 INFO L87 Difference]: Start difference. First operand 575 states and 1088 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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) [2022-11-23 15:39:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:39:48,734 INFO L93 Difference]: Finished difference Result 1723 states and 3262 transitions. [2022-11-23 15:39:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:39:48,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 148 [2022-11-23 15:39:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:39:48,744 INFO L225 Difference]: With dead ends: 1723 [2022-11-23 15:39:48,745 INFO L226 Difference]: Without dead ends: 1149 [2022-11-23 15:39:48,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:48,749 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:39:48,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 59 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:39:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-23 15:39:48,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 861. [2022-11-23 15:39:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 1.791860465116279) internal successors, (1541), 860 states have internal predecessors, (1541), 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) [2022-11-23 15:39:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1541 transitions. [2022-11-23 15:39:48,785 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1541 transitions. Word has length 148 [2022-11-23 15:39:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:39:48,786 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1541 transitions. [2022-11-23 15:39:48,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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) [2022-11-23 15:39:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1541 transitions. [2022-11-23 15:39:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-23 15:39:48,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:39:48,791 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:39:48,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:39:48,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:39:48,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:39:48,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1094384470, now seen corresponding path program 1 times [2022-11-23 15:39:48,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:39:48,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989979248] [2022-11-23 15:39:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:39:48,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:39:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:39:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:39:49,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:39:49,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989979248] [2022-11-23 15:39:49,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989979248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:39:49,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:39:49,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:39:49,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609079542] [2022-11-23 15:39:49,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:39:49,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:39:49,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:39:49,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:39:49,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:49,032 INFO L87 Difference]: Start difference. First operand 861 states and 1541 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 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) [2022-11-23 15:39:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:39:50,021 INFO L93 Difference]: Finished difference Result 2579 states and 4620 transitions. [2022-11-23 15:39:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:39:50,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 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) Word has length 151 [2022-11-23 15:39:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:39:50,030 INFO L225 Difference]: With dead ends: 2579 [2022-11-23 15:39:50,031 INFO L226 Difference]: Without dead ends: 1719 [2022-11-23 15:39:50,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:50,035 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:39:50,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:39:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-23 15:39:50,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-11-23 15:39:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.749708963911525) internal successors, (3006), 1718 states have internal predecessors, (3006), 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) [2022-11-23 15:39:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3006 transitions. [2022-11-23 15:39:50,090 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3006 transitions. Word has length 151 [2022-11-23 15:39:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:39:50,091 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 3006 transitions. [2022-11-23 15:39:50,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 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) [2022-11-23 15:39:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3006 transitions. [2022-11-23 15:39:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-23 15:39:50,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:39:50,096 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:39:50,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:39:50,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:39:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:39:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash 14512337, now seen corresponding path program 1 times [2022-11-23 15:39:50,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:39:50,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025613989] [2022-11-23 15:39:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:39:50,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:39:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:39:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:39:50,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:39:50,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025613989] [2022-11-23 15:39:50,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025613989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:39:50,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:39:50,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:39:50,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242676807] [2022-11-23 15:39:50,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:39:50,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:39:50,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:39:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:39:50,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:50,516 INFO L87 Difference]: Start difference. First operand 1719 states and 3006 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-11-23 15:39:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:39:51,610 INFO L93 Difference]: Finished difference Result 4295 states and 7476 transitions. [2022-11-23 15:39:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:39:51,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 153 [2022-11-23 15:39:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:39:51,620 INFO L225 Difference]: With dead ends: 4295 [2022-11-23 15:39:51,621 INFO L226 Difference]: Without dead ends: 2577 [2022-11-23 15:39:51,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:51,625 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 157 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:39:51,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 34 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:39:51,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2022-11-23 15:39:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2577. [2022-11-23 15:39:51,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 1.6975931677018634) internal successors, (4373), 2576 states have internal predecessors, (4373), 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) [2022-11-23 15:39:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4373 transitions. [2022-11-23 15:39:51,694 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4373 transitions. Word has length 153 [2022-11-23 15:39:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:39:51,695 INFO L495 AbstractCegarLoop]: Abstraction has 2577 states and 4373 transitions. [2022-11-23 15:39:51,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-11-23 15:39:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4373 transitions. [2022-11-23 15:39:51,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-23 15:39:51,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:39:51,701 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:39:51,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:39:51,702 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:39:51,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:39:51,702 INFO L85 PathProgramCache]: Analyzing trace with hash -316854053, now seen corresponding path program 1 times [2022-11-23 15:39:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:39:51,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757862392] [2022-11-23 15:39:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:39:51,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:39:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:39:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:39:52,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:39:52,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757862392] [2022-11-23 15:39:52,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757862392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:39:52,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:39:52,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:39:52,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866206973] [2022-11-23 15:39:52,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:39:52,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:39:52,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:39:52,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:39:52,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:52,014 INFO L87 Difference]: Start difference. First operand 2577 states and 4373 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-11-23 15:39:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:39:53,020 INFO L93 Difference]: Finished difference Result 6726 states and 11565 transitions. [2022-11-23 15:39:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:39:53,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 158 [2022-11-23 15:39:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:39:53,037 INFO L225 Difference]: With dead ends: 6726 [2022-11-23 15:39:53,038 INFO L226 Difference]: Without dead ends: 4150 [2022-11-23 15:39:53,042 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 [2022-11-23 15:39:53,043 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:39:53,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 232 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:39:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2022-11-23 15:39:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3721. [2022-11-23 15:39:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3720 states have (on average 1.647043010752688) internal successors, (6127), 3720 states have internal predecessors, (6127), 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) [2022-11-23 15:39:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 6127 transitions. [2022-11-23 15:39:53,146 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 6127 transitions. Word has length 158 [2022-11-23 15:39:53,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:39:53,147 INFO L495 AbstractCegarLoop]: Abstraction has 3721 states and 6127 transitions. [2022-11-23 15:39:53,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-11-23 15:39:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 6127 transitions. [2022-11-23 15:39:53,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-23 15:39:53,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:39:53,154 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:39:53,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:39:53,154 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:39:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:39:53,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1023957270, now seen corresponding path program 1 times [2022-11-23 15:39:53,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:39:53,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300443138] [2022-11-23 15:39:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:39:53,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:39:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:39:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:39:53,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:39:53,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300443138] [2022-11-23 15:39:53,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300443138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:39:53,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:39:53,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:39:53,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396250474] [2022-11-23 15:39:53,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:39:53,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:39:53,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:39:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:39:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:53,545 INFO L87 Difference]: Start difference. First operand 3721 states and 6127 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2022-11-23 15:39:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:39:54,553 INFO L93 Difference]: Finished difference Result 10015 states and 16429 transitions. [2022-11-23 15:39:54,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:39:54,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 160 [2022-11-23 15:39:54,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:39:54,581 INFO L225 Difference]: With dead ends: 10015 [2022-11-23 15:39:54,581 INFO L226 Difference]: Without dead ends: 6295 [2022-11-23 15:39:54,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:54,591 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 141 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:39:54,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 108 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:39:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6295 states. [2022-11-23 15:39:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6295 to 5580. [2022-11-23 15:39:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5580 states, 5579 states have (on average 1.4769671984226564) internal successors, (8240), 5579 states have internal predecessors, (8240), 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) [2022-11-23 15:39:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5580 states to 5580 states and 8240 transitions. [2022-11-23 15:39:54,757 INFO L78 Accepts]: Start accepts. Automaton has 5580 states and 8240 transitions. Word has length 160 [2022-11-23 15:39:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:39:54,757 INFO L495 AbstractCegarLoop]: Abstraction has 5580 states and 8240 transitions. [2022-11-23 15:39:54,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2022-11-23 15:39:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 5580 states and 8240 transitions. [2022-11-23 15:39:54,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-23 15:39:54,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:39:54,768 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:39:54,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:39:54,769 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:39:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:39:54,770 INFO L85 PathProgramCache]: Analyzing trace with hash 393907824, now seen corresponding path program 1 times [2022-11-23 15:39:54,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:39:54,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311875584] [2022-11-23 15:39:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:39:54,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:39:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:39:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:39:55,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:39:55,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311875584] [2022-11-23 15:39:55,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311875584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:39:55,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:39:55,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:39:55,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434639641] [2022-11-23 15:39:55,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:39:55,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:39:55,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:39:55,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:39:55,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:39:55,173 INFO L87 Difference]: Start difference. First operand 5580 states and 8240 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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) [2022-11-23 15:39:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:39:56,912 INFO L93 Difference]: Finished difference Result 21316 states and 31527 transitions. [2022-11-23 15:39:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:39:56,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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 170 [2022-11-23 15:39:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:39:56,986 INFO L225 Difference]: With dead ends: 21316 [2022-11-23 15:39:56,988 INFO L226 Difference]: Without dead ends: 15737 [2022-11-23 15:39:56,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:39:56,999 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 408 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:39:57,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 21 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 15:39:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15737 states. [2022-11-23 15:39:57,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15737 to 15733. [2022-11-23 15:39:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15733 states, 15732 states have (on average 1.4499745741164505) internal successors, (22811), 15732 states have internal predecessors, (22811), 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) [2022-11-23 15:39:57,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15733 states to 15733 states and 22811 transitions. [2022-11-23 15:39:57,425 INFO L78 Accepts]: Start accepts. Automaton has 15733 states and 22811 transitions. Word has length 170 [2022-11-23 15:39:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:39:57,425 INFO L495 AbstractCegarLoop]: Abstraction has 15733 states and 22811 transitions. [2022-11-23 15:39:57,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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) [2022-11-23 15:39:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 15733 states and 22811 transitions. [2022-11-23 15:39:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-23 15:39:57,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:39:57,437 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:39:57,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:39:57,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:39:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:39:57,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2044154603, now seen corresponding path program 1 times [2022-11-23 15:39:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:39:57,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295587861] [2022-11-23 15:39:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:39:57,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:39:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:39:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:39:57,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:39:57,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295587861] [2022-11-23 15:39:57,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295587861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:39:57,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:39:57,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:39:57,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728759070] [2022-11-23 15:39:57,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:39:57,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:39:57,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:39:57,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:39:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:57,730 INFO L87 Difference]: Start difference. First operand 15733 states and 22811 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2022-11-23 15:39:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:39:58,461 INFO L93 Difference]: Finished difference Result 46911 states and 67932 transitions. [2022-11-23 15:39:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:39:58,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 172 [2022-11-23 15:39:58,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:39:58,544 INFO L225 Difference]: With dead ends: 46911 [2022-11-23 15:39:58,545 INFO L226 Difference]: Without dead ends: 31179 [2022-11-23 15:39:58,568 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 [2022-11-23 15:39:58,571 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 244 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:39:58,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 313 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:39:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31179 states. [2022-11-23 15:39:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31179 to 31177. [2022-11-23 15:39:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31177 states, 31176 states have (on average 1.4438350012830383) internal successors, (45013), 31176 states have internal predecessors, (45013), 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) [2022-11-23 15:39:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31177 states to 31177 states and 45013 transitions. [2022-11-23 15:39:59,321 INFO L78 Accepts]: Start accepts. Automaton has 31177 states and 45013 transitions. Word has length 172 [2022-11-23 15:39:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:39:59,321 INFO L495 AbstractCegarLoop]: Abstraction has 31177 states and 45013 transitions. [2022-11-23 15:39:59,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2022-11-23 15:39:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 31177 states and 45013 transitions. [2022-11-23 15:39:59,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-23 15:39:59,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:39:59,335 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:39:59,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:39:59,335 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:39:59,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:39:59,336 INFO L85 PathProgramCache]: Analyzing trace with hash 789005572, now seen corresponding path program 1 times [2022-11-23 15:39:59,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:39:59,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432868659] [2022-11-23 15:39:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:39:59,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:39:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:39:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:39:59,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:39:59,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432868659] [2022-11-23 15:39:59,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432868659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:39:59,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:39:59,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:39:59,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791498934] [2022-11-23 15:39:59,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:39:59,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:39:59,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:39:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:39:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:39:59,538 INFO L87 Difference]: Start difference. First operand 31177 states and 45013 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2022-11-23 15:40:00,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:00,941 INFO L93 Difference]: Finished difference Result 79656 states and 115535 transitions. [2022-11-23 15:40:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:00,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 173 [2022-11-23 15:40:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:01,206 INFO L225 Difference]: With dead ends: 79656 [2022-11-23 15:40:01,207 INFO L226 Difference]: Without dead ends: 48480 [2022-11-23 15:40:01,251 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 [2022-11-23 15:40:01,252 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 173 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:01,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 216 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:40:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48480 states. [2022-11-23 15:40:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48480 to 47050. [2022-11-23 15:40:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47050 states, 47049 states have (on average 1.3672341601309272) internal successors, (64327), 47049 states have internal predecessors, (64327), 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) [2022-11-23 15:40:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47050 states to 47050 states and 64327 transitions. [2022-11-23 15:40:02,714 INFO L78 Accepts]: Start accepts. Automaton has 47050 states and 64327 transitions. Word has length 173 [2022-11-23 15:40:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:02,715 INFO L495 AbstractCegarLoop]: Abstraction has 47050 states and 64327 transitions. [2022-11-23 15:40:02,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2022-11-23 15:40:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 47050 states and 64327 transitions. [2022-11-23 15:40:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-23 15:40:02,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:02,732 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:40:02,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:40:02,733 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:40:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash -357159664, now seen corresponding path program 1 times [2022-11-23 15:40:02,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:02,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024201440] [2022-11-23 15:40:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:02,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:40:03,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:03,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024201440] [2022-11-23 15:40:03,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024201440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:03,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:03,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:40:03,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83122550] [2022-11-23 15:40:03,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:03,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:03,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:03,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:03,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:40:03,207 INFO L87 Difference]: Start difference. First operand 47050 states and 64327 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2022-11-23 15:40:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:04,893 INFO L93 Difference]: Finished difference Result 111402 states and 152671 transitions. [2022-11-23 15:40:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:04,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 177 [2022-11-23 15:40:04,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:05,014 INFO L225 Difference]: With dead ends: 111402 [2022-11-23 15:40:05,014 INFO L226 Difference]: Without dead ends: 64353 [2022-11-23 15:40:05,170 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 [2022-11-23 15:40:05,180 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 143 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:05,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 239 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:40:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64353 states. [2022-11-23 15:40:06,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64353 to 64353. [2022-11-23 15:40:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64353 states, 64352 states have (on average 1.3187002734957733) internal successors, (84861), 64352 states have internal predecessors, (84861), 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) [2022-11-23 15:40:06,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64353 states to 64353 states and 84861 transitions. [2022-11-23 15:40:06,552 INFO L78 Accepts]: Start accepts. Automaton has 64353 states and 84861 transitions. Word has length 177 [2022-11-23 15:40:06,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:06,554 INFO L495 AbstractCegarLoop]: Abstraction has 64353 states and 84861 transitions. [2022-11-23 15:40:06,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2022-11-23 15:40:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 64353 states and 84861 transitions. [2022-11-23 15:40:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-23 15:40:06,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:06,582 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:40:06,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:40:06,583 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:40:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:06,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1294212610, now seen corresponding path program 1 times [2022-11-23 15:40:06,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:06,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324866935] [2022-11-23 15:40:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:06,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 15:40:07,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:07,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324866935] [2022-11-23 15:40:07,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324866935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:07,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:07,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:40:07,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342029693] [2022-11-23 15:40:07,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:07,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:07,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:07,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:07,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:40:07,352 INFO L87 Difference]: Start difference. First operand 64353 states and 84861 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2022-11-23 15:40:09,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:09,435 INFO L93 Difference]: Finished difference Result 162024 states and 214071 transitions. [2022-11-23 15:40:09,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:09,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 186 [2022-11-23 15:40:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:09,628 INFO L225 Difference]: With dead ends: 162024 [2022-11-23 15:40:09,628 INFO L226 Difference]: Without dead ends: 97672 [2022-11-23 15:40:09,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:40:09,676 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 136 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:09,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 75 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:40:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97672 states. [2022-11-23 15:40:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97672 to 97672. [2022-11-23 15:40:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97672 states, 97671 states have (on average 1.2980925760973063) internal successors, (126786), 97671 states have internal predecessors, (126786), 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) [2022-11-23 15:40:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97672 states to 97672 states and 126786 transitions. [2022-11-23 15:40:11,559 INFO L78 Accepts]: Start accepts. Automaton has 97672 states and 126786 transitions. Word has length 186 [2022-11-23 15:40:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:11,560 INFO L495 AbstractCegarLoop]: Abstraction has 97672 states and 126786 transitions. [2022-11-23 15:40:11,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2022-11-23 15:40:11,560 INFO L276 IsEmpty]: Start isEmpty. Operand 97672 states and 126786 transitions. [2022-11-23 15:40:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-23 15:40:11,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:11,579 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:40:11,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:40:11,579 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:40:11,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:11,580 INFO L85 PathProgramCache]: Analyzing trace with hash -683624363, now seen corresponding path program 1 times [2022-11-23 15:40:11,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:11,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042378737] [2022-11-23 15:40:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:11,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:40:12,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:12,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042378737] [2022-11-23 15:40:12,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042378737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:40:12,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056770321] [2022-11-23 15:40:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:12,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:40:12,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:40:12,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:40:12,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:40:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:12,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:40:12,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:40:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 15:40:13,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:40:13,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056770321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:13,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:40:13,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 15:40:13,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606317906] [2022-11-23 15:40:13,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:13,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:13,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:40:13,094 INFO L87 Difference]: Start difference. First operand 97672 states and 126786 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2022-11-23 15:40:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:15,430 INFO L93 Difference]: Finished difference Result 233524 states and 306117 transitions. [2022-11-23 15:40:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:15,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 191 [2022-11-23 15:40:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:15,608 INFO L225 Difference]: With dead ends: 233524 [2022-11-23 15:40:15,609 INFO L226 Difference]: Without dead ends: 136282 [2022-11-23 15:40:15,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:40:15,661 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:15,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 63 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:40:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136282 states. [2022-11-23 15:40:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136282 to 136282. [2022-11-23 15:40:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136282 states, 136281 states have (on average 1.2865916745547803) internal successors, (175338), 136281 states have internal predecessors, (175338), 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) [2022-11-23 15:40:17,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136282 states to 136282 states and 175338 transitions. [2022-11-23 15:40:17,881 INFO L78 Accepts]: Start accepts. Automaton has 136282 states and 175338 transitions. Word has length 191 [2022-11-23 15:40:17,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:17,881 INFO L495 AbstractCegarLoop]: Abstraction has 136282 states and 175338 transitions. [2022-11-23 15:40:17,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2022-11-23 15:40:17,881 INFO L276 IsEmpty]: Start isEmpty. Operand 136282 states and 175338 transitions. [2022-11-23 15:40:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-23 15:40:18,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:18,330 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:40:18,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:40:18,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 15:40:18,531 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:40:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1660448171, now seen corresponding path program 1 times [2022-11-23 15:40:18,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:18,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598406841] [2022-11-23 15:40:18,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:18,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 15:40:19,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:19,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598406841] [2022-11-23 15:40:19,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598406841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:19,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:19,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:40:19,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260924384] [2022-11-23 15:40:19,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:19,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:19,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:19,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:19,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:40:19,198 INFO L87 Difference]: Start difference. First operand 136282 states and 175338 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2022-11-23 15:40:21,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:21,738 INFO L93 Difference]: Finished difference Result 273709 states and 352050 transitions. [2022-11-23 15:40:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:21,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 220 [2022-11-23 15:40:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:21,917 INFO L225 Difference]: With dead ends: 273709 [2022-11-23 15:40:21,917 INFO L226 Difference]: Without dead ends: 137857 [2022-11-23 15:40:21,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:40:21,966 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 117 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:21,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 114 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:40:22,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137857 states. [2022-11-23 15:40:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137857 to 136711. [2022-11-23 15:40:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136711 states, 136710 states have (on average 1.2861092824226465) internal successors, (175824), 136710 states have internal predecessors, (175824), 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) [2022-11-23 15:40:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136711 states to 136711 states and 175824 transitions. [2022-11-23 15:40:24,389 INFO L78 Accepts]: Start accepts. Automaton has 136711 states and 175824 transitions. Word has length 220 [2022-11-23 15:40:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:24,390 INFO L495 AbstractCegarLoop]: Abstraction has 136711 states and 175824 transitions. [2022-11-23 15:40:24,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2022-11-23 15:40:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 136711 states and 175824 transitions. [2022-11-23 15:40:24,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-23 15:40:24,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:24,413 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:40:24,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 15:40:24,413 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:40:24,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:24,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1212549011, now seen corresponding path program 1 times [2022-11-23 15:40:24,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:24,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161345329] [2022-11-23 15:40:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:24,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-23 15:40:25,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:25,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161345329] [2022-11-23 15:40:25,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161345329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:40:25,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957130258] [2022-11-23 15:40:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:25,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:40:25,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:40:25,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:40:25,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:40:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:25,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:40:25,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:40:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-23 15:40:26,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:40:26,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957130258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:26,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:40:26,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 15:40:26,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859567688] [2022-11-23 15:40:26,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:26,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:26,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:26,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:40:26,092 INFO L87 Difference]: Start difference. First operand 136711 states and 175824 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2022-11-23 15:40:28,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:28,717 INFO L93 Difference]: Finished difference Result 309600 states and 399633 transitions. [2022-11-23 15:40:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:28,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 235 [2022-11-23 15:40:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:28,934 INFO L225 Difference]: With dead ends: 309600 [2022-11-23 15:40:28,934 INFO L226 Difference]: Without dead ends: 173748 [2022-11-23 15:40:28,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:40:28,985 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:28,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 72 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:40:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173748 states. [2022-11-23 15:40:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173748 to 173176. [2022-11-23 15:40:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173176 states, 173175 states have (on average 1.2687570376786488) internal successors, (219717), 173175 states have internal predecessors, (219717), 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) [2022-11-23 15:40:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173176 states to 173176 states and 219717 transitions. [2022-11-23 15:40:32,515 INFO L78 Accepts]: Start accepts. Automaton has 173176 states and 219717 transitions. Word has length 235 [2022-11-23 15:40:32,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:32,516 INFO L495 AbstractCegarLoop]: Abstraction has 173176 states and 219717 transitions. [2022-11-23 15:40:32,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2022-11-23 15:40:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 173176 states and 219717 transitions. [2022-11-23 15:40:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-23 15:40:32,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:32,615 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:40:32,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:40:32,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 15:40:32,821 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:40:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:32,823 INFO L85 PathProgramCache]: Analyzing trace with hash 449391253, now seen corresponding path program 1 times [2022-11-23 15:40:32,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:32,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321657296] [2022-11-23 15:40:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:32,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 124 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-23 15:40:33,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:33,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321657296] [2022-11-23 15:40:33,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321657296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:40:33,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863297836] [2022-11-23 15:40:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:33,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:40:33,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:40:33,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:40:33,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:40:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:33,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:40:33,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:40:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-23 15:40:33,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:40:33,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863297836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:33,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:40:33,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 15:40:33,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793482410] [2022-11-23 15:40:33,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:33,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:33,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:33,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:40:33,798 INFO L87 Difference]: Start difference. First operand 173176 states and 219717 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-11-23 15:40:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:36,458 INFO L93 Difference]: Finished difference Result 354216 states and 450944 transitions. [2022-11-23 15:40:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:36,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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 268 [2022-11-23 15:40:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:36,710 INFO L225 Difference]: With dead ends: 354216 [2022-11-23 15:40:36,710 INFO L226 Difference]: Without dead ends: 181899 [2022-11-23 15:40:36,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:40:36,802 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 107 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:36,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 255 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:40:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181899 states. [2022-11-23 15:40:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181899 to 164596. [2022-11-23 15:40:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164596 states, 164595 states have (on average 1.208766973480361) internal successors, (198957), 164595 states have internal predecessors, (198957), 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) [2022-11-23 15:40:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164596 states to 164596 states and 198957 transitions. [2022-11-23 15:40:40,339 INFO L78 Accepts]: Start accepts. Automaton has 164596 states and 198957 transitions. Word has length 268 [2022-11-23 15:40:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:40,339 INFO L495 AbstractCegarLoop]: Abstraction has 164596 states and 198957 transitions. [2022-11-23 15:40:40,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-11-23 15:40:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 164596 states and 198957 transitions. [2022-11-23 15:40:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-11-23 15:40:40,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:40,379 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:40:40,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:40:40,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 15:40:40,587 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:40:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:40,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1400957128, now seen corresponding path program 1 times [2022-11-23 15:40:40,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:40,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236862065] [2022-11-23 15:40:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:40,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:41,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:41,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236862065] [2022-11-23 15:40:41,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236862065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:40:41,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450257903] [2022-11-23 15:40:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:41,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:40:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:40:41,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:40:41,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2c1f75-ba1c-4965-9bcd-130f781b4776/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:40:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:41,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:40:41,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:40:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:40:42,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:40:42,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450257903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:42,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:40:42,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-23 15:40:42,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680703415] [2022-11-23 15:40:42,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:42,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:42,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:42,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:42,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:40:42,685 INFO L87 Difference]: Start difference. First operand 164596 states and 198957 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2022-11-23 15:40:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:45,337 INFO L93 Difference]: Finished difference Result 339058 states and 410532 transitions. [2022-11-23 15:40:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:45,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 271 [2022-11-23 15:40:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:45,625 INFO L225 Difference]: With dead ends: 339058 [2022-11-23 15:40:45,625 INFO L226 Difference]: Without dead ends: 175607 [2022-11-23 15:40:45,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:40:45,699 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:45,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 198 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 15:40:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175607 states.