./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur --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 38de1f601deff70f21f1ef1f0123eb0d7f517b820846e07815605162625b0305 --- 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-38b53e6 [2022-11-25 22:41:32,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:41:32,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:41:32,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:41:32,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:41:32,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:41:32,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:41:32,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:41:32,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:41:32,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:41:32,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:41:32,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:41:32,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:41:32,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:41:32,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:41:32,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:41:32,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:41:32,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:41:32,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:41:32,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:41:32,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:41:32,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:41:32,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:41:32,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:41:32,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:41:32,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:41:32,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:41:32,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:41:32,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:41:32,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:41:32,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:41:32,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:41:32,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:41:32,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:41:32,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:41:32,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:41:32,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:41:32,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:41:32,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:41:32,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:41:32,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:41:32,145 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:41:32,184 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:41:32,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:41:32,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:41:32,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:41:32,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:41:32,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:41:32,186 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:41:32,186 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:41:32,187 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:41:32,187 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:41:32,187 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:41:32,188 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:41:32,188 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:41:32,188 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:41:32,188 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:41:32,189 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:41:32,189 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:41:32,189 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:41:32,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:41:32,190 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:41:32,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:41:32,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:41:32,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:41:32,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:41:32,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:41:32,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:41:32,192 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:41:32,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:41:32,193 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:41:32,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:41:32,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:41:32,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:41:32,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:41:32,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:41:32,194 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:41:32,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:41:32,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:41:32,195 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:41:32,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:41:32,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:41:32,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:41:32,196 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_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38de1f601deff70f21f1ef1f0123eb0d7f517b820846e07815605162625b0305 [2022-11-25 22:41:32,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:41:32,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:41:32,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:41:32,534 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:41:32,534 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:41:32,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-11-25 22:41:35,722 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:41:36,106 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:41:36,107 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-11-25 22:41:36,128 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/data/4f2224fe8/d8c3155ddcae4db883b0589aa0801f9c/FLAGca17fd877 [2022-11-25 22:41:36,147 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/data/4f2224fe8/d8c3155ddcae4db883b0589aa0801f9c [2022-11-25 22:41:36,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:41:36,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:41:36,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:41:36,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:41:36,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:41:36,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:41:36" (1/1) ... [2022-11-25 22:41:36,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336562c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:36, skipping insertion in model container [2022-11-25 22:41:36,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:41:36" (1/1) ... [2022-11-25 22:41:36,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:41:36,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:41:37,049 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_47be2b88-68a6-4080-89c7-55b21f98b69d/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30493,30506] [2022-11-25 22:41:37,139 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_47be2b88-68a6-4080-89c7-55b21f98b69d/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33882,33895] [2022-11-25 22:41:37,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:41:37,432 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:41:37,770 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_47be2b88-68a6-4080-89c7-55b21f98b69d/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30493,30506] [2022-11-25 22:41:37,829 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_47be2b88-68a6-4080-89c7-55b21f98b69d/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33882,33895] [2022-11-25 22:41:38,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:41:38,038 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:41:38,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38 WrapperNode [2022-11-25 22:41:38,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:41:38,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:41:38,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:41:38,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:41:38,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (1/1) ... [2022-11-25 22:41:38,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (1/1) ... [2022-11-25 22:41:38,185 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3812 [2022-11-25 22:41:38,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:41:38,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:41:38,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:41:38,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:41:38,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (1/1) ... [2022-11-25 22:41:38,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (1/1) ... [2022-11-25 22:41:38,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (1/1) ... [2022-11-25 22:41:38,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (1/1) ... [2022-11-25 22:41:38,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (1/1) ... [2022-11-25 22:41:38,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (1/1) ... [2022-11-25 22:41:38,279 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (1/1) ... [2022-11-25 22:41:38,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (1/1) ... [2022-11-25 22:41:38,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:41:38,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:41:38,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:41:38,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:41:38,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (1/1) ... [2022-11-25 22:41:38,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:41:38,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:41:38,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:41:38,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47be2b88-68a6-4080-89c7-55b21f98b69d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:41:38,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:41:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:41:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:41:38,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:41:38,732 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:41:38,734 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:41:41,407 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:41:43,328 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:41:43,328 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 22:41:43,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:41:43 BoogieIcfgContainer [2022-11-25 22:41:43,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:41:43,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:41:43,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:41:43,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:41:43,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:41:36" (1/3) ... [2022-11-25 22:41:43,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734cde4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:41:43, skipping insertion in model container [2022-11-25 22:41:43,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:38" (2/3) ... [2022-11-25 22:41:43,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734cde4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:41:43, skipping insertion in model container [2022-11-25 22:41:43,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:41:43" (3/3) ... [2022-11-25 22:41:43,346 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-11-25 22:41:43,366 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:41:43,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 22:41:43,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:41:43,444 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;@1d647c8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:41:43,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 22:41:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 737 states, 734 states have (on average 1.6362397820163488) internal successors, (1201), 736 states have internal predecessors, (1201), 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) [2022-11-25 22:41:43,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-25 22:41:43,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:43,472 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] [2022-11-25 22:41:43,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:43,479 INFO L85 PathProgramCache]: Analyzing trace with hash -437292113, now seen corresponding path program 1 times [2022-11-25 22:41:43,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:43,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12412240] [2022-11-25 22:41:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:43,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:41:49,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:49,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12412240] [2022-11-25 22:41:49,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12412240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:49,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:49,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:41:49,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812957247] [2022-11-25 22:41:49,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:49,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:41:49,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:41:49,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:49,335 INFO L87 Difference]: Start difference. First operand has 737 states, 734 states have (on average 1.6362397820163488) internal successors, (1201), 736 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2022-11-25 22:41:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:49,911 INFO L93 Difference]: Finished difference Result 1761 states and 2878 transitions. [2022-11-25 22:41:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:41:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 99 [2022-11-25 22:41:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:49,935 INFO L225 Difference]: With dead ends: 1761 [2022-11-25 22:41:49,937 INFO L226 Difference]: Without dead ends: 1158 [2022-11-25 22:41:49,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:49,951 INFO L413 NwaCegarLoop]: 1240 mSDtfsCounter, 876 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 3118 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:49,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 3118 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:41:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-11-25 22:41:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1154. [2022-11-25 22:41:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1152 states have (on average 1.6284722222222223) internal successors, (1876), 1153 states have internal predecessors, (1876), 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) [2022-11-25 22:41:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1876 transitions. [2022-11-25 22:41:50,093 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1876 transitions. Word has length 99 [2022-11-25 22:41:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:50,093 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1876 transitions. [2022-11-25 22:41:50,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2022-11-25 22:41:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1876 transitions. [2022-11-25 22:41:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-25 22:41:50,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:50,106 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] [2022-11-25 22:41:50,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:41:50,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:50,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1456315218, now seen corresponding path program 1 times [2022-11-25 22:41:50,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:50,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576852256] [2022-11-25 22:41:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:50,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:41:51,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:51,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576852256] [2022-11-25 22:41:51,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576852256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:51,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:51,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:41:51,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943059030] [2022-11-25 22:41:51,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:51,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:41:51,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:51,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:41:51,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:51,487 INFO L87 Difference]: Start difference. First operand 1154 states and 1876 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2022-11-25 22:41:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:52,106 INFO L93 Difference]: Finished difference Result 2600 states and 4229 transitions. [2022-11-25 22:41:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:41:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 105 [2022-11-25 22:41:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:52,117 INFO L225 Difference]: With dead ends: 2600 [2022-11-25 22:41:52,118 INFO L226 Difference]: Without dead ends: 1585 [2022-11-25 22:41:52,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:52,124 INFO L413 NwaCegarLoop]: 1858 mSDtfsCounter, 1896 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 2777 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:52,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1896 Valid, 2777 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:41:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2022-11-25 22:41:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1581. [2022-11-25 22:41:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1579 states have (on average 1.6111462951234958) internal successors, (2544), 1580 states have internal predecessors, (2544), 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) [2022-11-25 22:41:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2544 transitions. [2022-11-25 22:41:52,273 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2544 transitions. Word has length 105 [2022-11-25 22:41:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:52,274 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2544 transitions. [2022-11-25 22:41:52,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2022-11-25 22:41:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2544 transitions. [2022-11-25 22:41:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-25 22:41:52,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:52,278 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] [2022-11-25 22:41:52,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:41:52,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash -450266623, now seen corresponding path program 1 times [2022-11-25 22:41:52,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129157493] [2022-11-25 22:41:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:52,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:41:55,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:55,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129157493] [2022-11-25 22:41:55,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129157493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:55,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:55,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:41:55,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817751324] [2022-11-25 22:41:55,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:55,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:41:55,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:55,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:41:55,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:55,780 INFO L87 Difference]: Start difference. First operand 1581 states and 2544 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2022-11-25 22:41:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:56,326 INFO L93 Difference]: Finished difference Result 4068 states and 6562 transitions. [2022-11-25 22:41:56,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:41:56,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 108 [2022-11-25 22:41:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:56,336 INFO L225 Difference]: With dead ends: 4068 [2022-11-25 22:41:56,336 INFO L226 Difference]: Without dead ends: 2645 [2022-11-25 22:41:56,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:56,340 INFO L413 NwaCegarLoop]: 1117 mSDtfsCounter, 1724 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1724 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:56,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1724 Valid, 2017 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:41:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2645 states. [2022-11-25 22:41:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2645 to 2641. [2022-11-25 22:41:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2639 states have (on average 1.610458507010231) internal successors, (4250), 2640 states have internal predecessors, (4250), 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) [2022-11-25 22:41:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4250 transitions. [2022-11-25 22:41:56,544 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4250 transitions. Word has length 108 [2022-11-25 22:41:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:56,545 INFO L495 AbstractCegarLoop]: Abstraction has 2641 states and 4250 transitions. [2022-11-25 22:41:56,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2022-11-25 22:41:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4250 transitions. [2022-11-25 22:41:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-25 22:41:56,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:56,550 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] [2022-11-25 22:41:56,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:41:56,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash -440725989, now seen corresponding path program 1 times [2022-11-25 22:41:56,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:56,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169054352] [2022-11-25 22:41:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:56,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:41:57,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:57,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169054352] [2022-11-25 22:41:57,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169054352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:57,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:57,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:41:57,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67814057] [2022-11-25 22:41:57,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:57,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:41:57,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:57,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:41:57,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:57,869 INFO L87 Difference]: Start difference. First operand 2641 states and 4250 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2022-11-25 22:41:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:58,579 INFO L93 Difference]: Finished difference Result 6304 states and 10156 transitions. [2022-11-25 22:41:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:41:58,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 114 [2022-11-25 22:41:58,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:58,593 INFO L225 Difference]: With dead ends: 6304 [2022-11-25 22:41:58,593 INFO L226 Difference]: Without dead ends: 3820 [2022-11-25 22:41:58,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:58,599 INFO L413 NwaCegarLoop]: 1879 mSDtfsCounter, 969 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 3733 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:58,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 3733 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:41:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2022-11-25 22:41:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 3816. [2022-11-25 22:41:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3814 states have (on average 1.6082852648138437) internal successors, (6134), 3815 states have internal predecessors, (6134), 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) [2022-11-25 22:41:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 6134 transitions. [2022-11-25 22:41:58,904 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 6134 transitions. Word has length 114 [2022-11-25 22:41:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:58,905 INFO L495 AbstractCegarLoop]: Abstraction has 3816 states and 6134 transitions. [2022-11-25 22:41:58,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2022-11-25 22:41:58,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 6134 transitions. [2022-11-25 22:41:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-25 22:41:58,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:58,911 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] [2022-11-25 22:41:58,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:41:58,911 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash 376379404, now seen corresponding path program 1 times [2022-11-25 22:41:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:58,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121148650] [2022-11-25 22:41:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:58,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:42:01,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:01,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121148650] [2022-11-25 22:42:01,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121148650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:42:01,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:42:01,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:42:01,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87573192] [2022-11-25 22:42:01,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:42:01,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:42:01,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:01,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:42:01,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:01,606 INFO L87 Difference]: Start difference. First operand 3816 states and 6134 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2022-11-25 22:42:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:02,524 INFO L93 Difference]: Finished difference Result 10173 states and 16383 transitions. [2022-11-25 22:42:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:42:02,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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 117 [2022-11-25 22:42:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:02,551 INFO L225 Difference]: With dead ends: 10173 [2022-11-25 22:42:02,551 INFO L226 Difference]: Without dead ends: 6533 [2022-11-25 22:42:02,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:02,568 INFO L413 NwaCegarLoop]: 1335 mSDtfsCounter, 852 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 3077 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:02,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 3077 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:42:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2022-11-25 22:42:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 6529. [2022-11-25 22:42:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 6527 states have (on average 1.6053316990960624) internal successors, (10478), 6528 states have internal predecessors, (10478), 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) [2022-11-25 22:42:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 10478 transitions. [2022-11-25 22:42:03,400 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 10478 transitions. Word has length 117 [2022-11-25 22:42:03,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:03,401 INFO L495 AbstractCegarLoop]: Abstraction has 6529 states and 10478 transitions. [2022-11-25 22:42:03,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2022-11-25 22:42:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 10478 transitions. [2022-11-25 22:42:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-25 22:42:03,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:03,415 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] [2022-11-25 22:42:03,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:42:03,415 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash 132110001, now seen corresponding path program 1 times [2022-11-25 22:42:03,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:03,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060545787] [2022-11-25 22:42:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:03,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:42:04,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:04,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060545787] [2022-11-25 22:42:04,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060545787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:42:04,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:42:04,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:42:04,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731517667] [2022-11-25 22:42:04,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:42:04,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:42:04,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:04,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:42:04,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:04,501 INFO L87 Difference]: Start difference. First operand 6529 states and 10478 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2022-11-25 22:42:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:05,742 INFO L93 Difference]: Finished difference Result 16046 states and 25780 transitions. [2022-11-25 22:42:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:42:05,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 123 [2022-11-25 22:42:05,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:05,813 INFO L225 Difference]: With dead ends: 16046 [2022-11-25 22:42:05,814 INFO L226 Difference]: Without dead ends: 9692 [2022-11-25 22:42:05,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:05,842 INFO L413 NwaCegarLoop]: 1849 mSDtfsCounter, 960 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 3647 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:05,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [960 Valid, 3647 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:42:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9692 states. [2022-11-25 22:42:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9692 to 9688. [2022-11-25 22:42:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 9686 states have (on average 1.602828825108404) internal successors, (15525), 9687 states have internal predecessors, (15525), 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) [2022-11-25 22:42:06,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 15525 transitions. [2022-11-25 22:42:06,718 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 15525 transitions. Word has length 123 [2022-11-25 22:42:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:06,718 INFO L495 AbstractCegarLoop]: Abstraction has 9688 states and 15525 transitions. [2022-11-25 22:42:06,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2022-11-25 22:42:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 15525 transitions. [2022-11-25 22:42:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-25 22:42:06,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:06,730 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] [2022-11-25 22:42:06,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:42:06,730 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:06,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2120245380, now seen corresponding path program 1 times [2022-11-25 22:42:06,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:06,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652349037] [2022-11-25 22:42:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:06,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:42:09,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:09,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652349037] [2022-11-25 22:42:09,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652349037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:42:09,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:42:09,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:42:09,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041406646] [2022-11-25 22:42:09,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:42:09,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:42:09,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:09,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:42:09,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:09,271 INFO L87 Difference]: Start difference. First operand 9688 states and 15525 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2022-11-25 22:42:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:10,884 INFO L93 Difference]: Finished difference Result 26097 states and 41873 transitions. [2022-11-25 22:42:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:42:10,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 126 [2022-11-25 22:42:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:10,936 INFO L225 Difference]: With dead ends: 26097 [2022-11-25 22:42:10,936 INFO L226 Difference]: Without dead ends: 16603 [2022-11-25 22:42:10,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:10,947 INFO L413 NwaCegarLoop]: 1113 mSDtfsCounter, 1692 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:10,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1692 Valid, 1955 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:42:10,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16603 states. [2022-11-25 22:42:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16603 to 16599. [2022-11-25 22:42:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16599 states, 16597 states have (on average 1.5975176236669277) internal successors, (26514), 16598 states have internal predecessors, (26514), 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) [2022-11-25 22:42:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16599 states to 16599 states and 26514 transitions. [2022-11-25 22:42:12,181 INFO L78 Accepts]: Start accepts. Automaton has 16599 states and 26514 transitions. Word has length 126 [2022-11-25 22:42:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:12,181 INFO L495 AbstractCegarLoop]: Abstraction has 16599 states and 26514 transitions. [2022-11-25 22:42:12,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2022-11-25 22:42:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 16599 states and 26514 transitions. [2022-11-25 22:42:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-25 22:42:12,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:12,201 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] [2022-11-25 22:42:12,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:42:12,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:12,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:12,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2013997458, now seen corresponding path program 1 times [2022-11-25 22:42:12,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:12,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585870549] [2022-11-25 22:42:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:12,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:42:13,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:13,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585870549] [2022-11-25 22:42:13,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585870549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:42:13,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:42:13,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:42:13,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691307376] [2022-11-25 22:42:13,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:42:13,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:42:13,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:13,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:42:13,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:13,220 INFO L87 Difference]: Start difference. First operand 16599 states and 26514 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2022-11-25 22:42:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:15,177 INFO L93 Difference]: Finished difference Result 41388 states and 66192 transitions. [2022-11-25 22:42:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:42:15,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 132 [2022-11-25 22:42:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:15,257 INFO L225 Difference]: With dead ends: 41388 [2022-11-25 22:42:15,257 INFO L226 Difference]: Without dead ends: 24982 [2022-11-25 22:42:15,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:15,277 INFO L413 NwaCegarLoop]: 1819 mSDtfsCounter, 1902 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 2690 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:15,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1902 Valid, 2690 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:42:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24982 states. [2022-11-25 22:42:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24982 to 24978. [2022-11-25 22:42:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24978 states, 24976 states have (on average 1.5948910954516335) internal successors, (39834), 24977 states have internal predecessors, (39834), 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) [2022-11-25 22:42:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24978 states to 24978 states and 39834 transitions. [2022-11-25 22:42:17,236 INFO L78 Accepts]: Start accepts. Automaton has 24978 states and 39834 transitions. Word has length 132 [2022-11-25 22:42:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:17,236 INFO L495 AbstractCegarLoop]: Abstraction has 24978 states and 39834 transitions. [2022-11-25 22:42:17,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2022-11-25 22:42:17,237 INFO L276 IsEmpty]: Start isEmpty. Operand 24978 states and 39834 transitions. [2022-11-25 22:42:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-25 22:42:17,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:17,261 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] [2022-11-25 22:42:17,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:42:17,261 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash -644704025, now seen corresponding path program 1 times [2022-11-25 22:42:17,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:17,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867044314] [2022-11-25 22:42:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:17,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:42:19,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:19,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867044314] [2022-11-25 22:42:19,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867044314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:42:19,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:42:19,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:42:19,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126802276] [2022-11-25 22:42:19,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:42:19,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:42:19,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:19,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:42:19,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:19,035 INFO L87 Difference]: Start difference. First operand 24978 states and 39834 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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) [2022-11-25 22:42:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:22,008 INFO L93 Difference]: Finished difference Result 62986 states and 100243 transitions. [2022-11-25 22:42:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:42:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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 135 [2022-11-25 22:42:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:22,094 INFO L225 Difference]: With dead ends: 62986 [2022-11-25 22:42:22,095 INFO L226 Difference]: Without dead ends: 38214 [2022-11-25 22:42:22,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:22,130 INFO L413 NwaCegarLoop]: 1815 mSDtfsCounter, 1824 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1824 SdHoareTripleChecker+Valid, 2693 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:22,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1824 Valid, 2693 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:42:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states. [2022-11-25 22:42:25,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38214 to 38210. [2022-11-25 22:42:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38210 states, 38208 states have (on average 1.5799832495812396) internal successors, (60368), 38209 states have internal predecessors, (60368), 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) [2022-11-25 22:42:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38210 states to 38210 states and 60368 transitions. [2022-11-25 22:42:25,716 INFO L78 Accepts]: Start accepts. Automaton has 38210 states and 60368 transitions. Word has length 135 [2022-11-25 22:42:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:25,716 INFO L495 AbstractCegarLoop]: Abstraction has 38210 states and 60368 transitions. [2022-11-25 22:42:25,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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) [2022-11-25 22:42:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 38210 states and 60368 transitions. [2022-11-25 22:42:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-25 22:42:25,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:25,751 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] [2022-11-25 22:42:25,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 22:42:25,751 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1518658920, now seen corresponding path program 1 times [2022-11-25 22:42:25,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:25,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232784685] [2022-11-25 22:42:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:25,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:42:28,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:28,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232784685] [2022-11-25 22:42:28,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232784685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:42:28,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:42:28,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:42:28,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290974694] [2022-11-25 22:42:28,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:42:28,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:42:28,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:42:28,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:28,092 INFO L87 Difference]: Start difference. First operand 38210 states and 60368 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2022-11-25 22:42:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:31,208 INFO L93 Difference]: Finished difference Result 76218 states and 120418 transitions. [2022-11-25 22:42:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:42:31,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 136 [2022-11-25 22:42:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:31,259 INFO L225 Difference]: With dead ends: 76218 [2022-11-25 22:42:31,259 INFO L226 Difference]: Without dead ends: 38214 [2022-11-25 22:42:31,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:31,289 INFO L413 NwaCegarLoop]: 1821 mSDtfsCounter, 906 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:31,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 3625 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:42:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states. [2022-11-25 22:42:34,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38214 to 38210. [2022-11-25 22:42:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38210 states, 38208 states have (on average 1.575298366834171) internal successors, (60189), 38209 states have internal predecessors, (60189), 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) [2022-11-25 22:42:34,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38210 states to 38210 states and 60189 transitions. [2022-11-25 22:42:34,452 INFO L78 Accepts]: Start accepts. Automaton has 38210 states and 60189 transitions. Word has length 136 [2022-11-25 22:42:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:34,453 INFO L495 AbstractCegarLoop]: Abstraction has 38210 states and 60189 transitions. [2022-11-25 22:42:34,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2022-11-25 22:42:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 38210 states and 60189 transitions. [2022-11-25 22:42:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:42:34,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:34,481 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] [2022-11-25 22:42:34,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 22:42:34,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:34,482 INFO L85 PathProgramCache]: Analyzing trace with hash -286827826, now seen corresponding path program 1 times [2022-11-25 22:42:34,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:34,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30825425] [2022-11-25 22:42:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:34,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:42:36,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:36,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30825425] [2022-11-25 22:42:36,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30825425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:42:36,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:42:36,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:42:36,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930525922] [2022-11-25 22:42:36,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:42:36,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:42:36,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:36,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:42:36,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:36,105 INFO L87 Difference]: Start difference. First operand 38210 states and 60189 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2022-11-25 22:42:39,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:39,830 INFO L93 Difference]: Finished difference Result 76218 states and 120061 transitions. [2022-11-25 22:42:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:42:39,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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 137 [2022-11-25 22:42:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:39,898 INFO L225 Difference]: With dead ends: 76218 [2022-11-25 22:42:39,899 INFO L226 Difference]: Without dead ends: 38214 [2022-11-25 22:42:39,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:42:39,925 INFO L413 NwaCegarLoop]: 1811 mSDtfsCounter, 934 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 3561 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:39,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 3561 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:42:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38214 states.