./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI --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 a9066ec9ee7e14c7adf63eb106d945f26321fdd64b3726b0fe14ce5b202a77d4 --- 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-5e519f3 [2022-11-03 01:48:37,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:48:37,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:48:37,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:48:37,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:48:37,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:48:37,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:48:37,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:48:37,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:48:37,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:48:37,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:48:37,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:48:37,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:48:37,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:48:37,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:48:37,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:48:37,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:48:37,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:48:37,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:48:37,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:48:37,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:48:37,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:48:37,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:48:37,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:48:37,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:48:37,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:48:37,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:48:37,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:48:37,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:48:37,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:48:37,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:48:37,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:48:37,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:48:37,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:48:37,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:48:37,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:48:37,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:48:37,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:48:37,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:48:37,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:48:37,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:48:37,190 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:48:37,232 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:48:37,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:48:37,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:48:37,234 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:48:37,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:48:37,235 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:48:37,235 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:48:37,235 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:48:37,236 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:48:37,236 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:48:37,237 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:48:37,237 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:48:37,237 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:48:37,238 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:48:37,238 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:48:37,238 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:48:37,238 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:48:37,239 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:48:37,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:48:37,240 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:48:37,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:48:37,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:48:37,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:48:37,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:48:37,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:48:37,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:48:37,242 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:48:37,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:48:37,243 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:48:37,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:48:37,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:48:37,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:48:37,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:37,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:48:37,244 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:48:37,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:48:37,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:48:37,245 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:48:37,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:48:37,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:48:37,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:48:37,246 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_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9066ec9ee7e14c7adf63eb106d945f26321fdd64b3726b0fe14ce5b202a77d4 [2022-11-03 01:48:37,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:48:37,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:48:37,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:48:37,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:48:37,565 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:48:37,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-03 01:48:37,655 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/data/1785246bb/858069f74032419da04ca6495ad49e46/FLAGa21759170 [2022-11-03 01:48:38,359 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:48:38,361 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-03 01:48:38,385 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/data/1785246bb/858069f74032419da04ca6495ad49e46/FLAGa21759170 [2022-11-03 01:48:38,485 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/data/1785246bb/858069f74032419da04ca6495ad49e46 [2022-11-03 01:48:38,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:48:38,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:48:38,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:38,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:48:38,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:48:38,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:38" (1/1) ... [2022-11-03 01:48:38,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a71235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:38, skipping insertion in model container [2022-11-03 01:48:38,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:38" (1/1) ... [2022-11-03 01:48:38,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:48:38,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:48:39,102 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[21939,21952] [2022-11-03 01:48:39,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:39,258 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:48:39,492 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[21939,21952] [2022-11-03 01:48:39,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:39,651 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:48:39,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39 WrapperNode [2022-11-03 01:48:39,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:39,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:39,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:48:39,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:48:39,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (1/1) ... [2022-11-03 01:48:39,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (1/1) ... [2022-11-03 01:48:39,813 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2781 [2022-11-03 01:48:39,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:39,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:48:39,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:48:39,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:48:39,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (1/1) ... [2022-11-03 01:48:39,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (1/1) ... [2022-11-03 01:48:39,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (1/1) ... [2022-11-03 01:48:39,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (1/1) ... [2022-11-03 01:48:39,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (1/1) ... [2022-11-03 01:48:39,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (1/1) ... [2022-11-03 01:48:39,879 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (1/1) ... [2022-11-03 01:48:39,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (1/1) ... [2022-11-03 01:48:39,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:48:39,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:48:39,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:48:39,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:48:39,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (1/1) ... [2022-11-03 01:48:39,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:39,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:39,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:48:39,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f334177-eacd-4476-8447-d59ed1357dde/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:48:40,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:48:40,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:48:40,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:48:40,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:48:40,334 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:48:40,336 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:48:42,301 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:48:43,005 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:48:43,005 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 01:48:43,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:43 BoogieIcfgContainer [2022-11-03 01:48:43,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:48:43,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:48:43,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:48:43,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:48:43,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:48:38" (1/3) ... [2022-11-03 01:48:43,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55443a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:43, skipping insertion in model container [2022-11-03 01:48:43,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:39" (2/3) ... [2022-11-03 01:48:43,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55443a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:43, skipping insertion in model container [2022-11-03 01:48:43,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:43" (3/3) ... [2022-11-03 01:48:43,020 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-03 01:48:43,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:48:43,038 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:48:43,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:48:43,145 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;@410901de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:48:43,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:48:43,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 617 states, 615 states have (on average 1.7235772357723578) internal successors, (1060), 616 states have internal predecessors, (1060), 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) [2022-11-03 01:48:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-03 01:48:43,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:43,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:43,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash 629525777, now seen corresponding path program 1 times [2022-11-03 01:48:43,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:43,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633022590] [2022-11-03 01:48:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:43,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:44,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:44,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633022590] [2022-11-03 01:48:44,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633022590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:44,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:44,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:44,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103359825] [2022-11-03 01:48:44,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:44,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:44,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:44,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:44,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:44,128 INFO L87 Difference]: Start difference. First operand has 617 states, 615 states have (on average 1.7235772357723578) internal successors, (1060), 616 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2022-11-03 01:48:44,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:44,446 INFO L93 Difference]: Finished difference Result 865 states and 1459 transitions. [2022-11-03 01:48:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:44,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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 192 [2022-11-03 01:48:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:44,469 INFO L225 Difference]: With dead ends: 865 [2022-11-03 01:48:44,470 INFO L226 Difference]: Without dead ends: 726 [2022-11-03 01:48:44,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:44,477 INFO L413 NwaCegarLoop]: 1163 mSDtfsCounter, 219 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:44,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 2106 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:44,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-11-03 01:48:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 724. [2022-11-03 01:48:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 1.6251728907330567) internal successors, (1175), 723 states have internal predecessors, (1175), 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) [2022-11-03 01:48:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1175 transitions. [2022-11-03 01:48:44,603 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1175 transitions. Word has length 192 [2022-11-03 01:48:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:44,606 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 1175 transitions. [2022-11-03 01:48:44,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2022-11-03 01:48:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1175 transitions. [2022-11-03 01:48:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 01:48:44,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:44,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:44,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:48:44,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1948426669, now seen corresponding path program 1 times [2022-11-03 01:48:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:44,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560717279] [2022-11-03 01:48:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:44,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:45,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560717279] [2022-11-03 01:48:45,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560717279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:45,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:45,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:45,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286037264] [2022-11-03 01:48:45,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:45,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:45,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:45,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:45,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:45,083 INFO L87 Difference]: Start difference. First operand 724 states and 1175 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2022-11-03 01:48:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:45,338 INFO L93 Difference]: Finished difference Result 1099 states and 1782 transitions. [2022-11-03 01:48:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:45,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 194 [2022-11-03 01:48:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:45,343 INFO L225 Difference]: With dead ends: 1099 [2022-11-03 01:48:45,343 INFO L226 Difference]: Without dead ends: 857 [2022-11-03 01:48:45,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:45,346 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 207 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:45,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1802 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-03 01:48:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 855. [2022-11-03 01:48:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.620608899297424) internal successors, (1384), 854 states have internal predecessors, (1384), 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) [2022-11-03 01:48:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1384 transitions. [2022-11-03 01:48:45,392 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1384 transitions. Word has length 194 [2022-11-03 01:48:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:45,393 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1384 transitions. [2022-11-03 01:48:45,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2022-11-03 01:48:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1384 transitions. [2022-11-03 01:48:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-03 01:48:45,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:45,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:45,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:48:45,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:45,398 INFO L85 PathProgramCache]: Analyzing trace with hash 685172234, now seen corresponding path program 1 times [2022-11-03 01:48:45,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:45,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003183716] [2022-11-03 01:48:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:45,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:45,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:45,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003183716] [2022-11-03 01:48:45,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003183716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:45,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:45,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:45,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843344424] [2022-11-03 01:48:45,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:45,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:45,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:45,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:45,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:45,671 INFO L87 Difference]: Start difference. First operand 855 states and 1384 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2022-11-03 01:48:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:45,967 INFO L93 Difference]: Finished difference Result 1533 states and 2481 transitions. [2022-11-03 01:48:45,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 198 [2022-11-03 01:48:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:45,975 INFO L225 Difference]: With dead ends: 1533 [2022-11-03 01:48:45,975 INFO L226 Difference]: Without dead ends: 1161 [2022-11-03 01:48:45,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:45,977 INFO L413 NwaCegarLoop]: 1061 mSDtfsCounter, 206 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:45,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 1950 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-11-03 01:48:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1159. [2022-11-03 01:48:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 1.620034542314335) internal successors, (1876), 1158 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) [2022-11-03 01:48:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1876 transitions. [2022-11-03 01:48:46,051 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1876 transitions. Word has length 198 [2022-11-03 01:48:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:46,052 INFO L495 AbstractCegarLoop]: Abstraction has 1159 states and 1876 transitions. [2022-11-03 01:48:46,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2022-11-03 01:48:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1876 transitions. [2022-11-03 01:48:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-03 01:48:46,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:46,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:46,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:48:46,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:46,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:46,057 INFO L85 PathProgramCache]: Analyzing trace with hash -660226734, now seen corresponding path program 1 times [2022-11-03 01:48:46,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:46,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011754890] [2022-11-03 01:48:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:46,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:46,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:46,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011754890] [2022-11-03 01:48:46,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011754890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:46,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:46,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:46,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9271159] [2022-11-03 01:48:46,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:46,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:46,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:46,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:46,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:46,358 INFO L87 Difference]: Start difference. First operand 1159 states and 1876 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2022-11-03 01:48:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:46,646 INFO L93 Difference]: Finished difference Result 2230 states and 3605 transitions. [2022-11-03 01:48:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:46,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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 200 [2022-11-03 01:48:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:46,655 INFO L225 Difference]: With dead ends: 2230 [2022-11-03 01:48:46,655 INFO L226 Difference]: Without dead ends: 1554 [2022-11-03 01:48:46,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:46,658 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 205 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:46,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1818 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:46,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-11-03 01:48:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1552. [2022-11-03 01:48:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 1.6170212765957446) internal successors, (2508), 1551 states have internal predecessors, (2508), 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) [2022-11-03 01:48:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2508 transitions. [2022-11-03 01:48:46,770 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2508 transitions. Word has length 200 [2022-11-03 01:48:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:46,771 INFO L495 AbstractCegarLoop]: Abstraction has 1552 states and 2508 transitions. [2022-11-03 01:48:46,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2022-11-03 01:48:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2508 transitions. [2022-11-03 01:48:46,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-03 01:48:46,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:46,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:46,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:48:46,776 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:46,777 INFO L85 PathProgramCache]: Analyzing trace with hash -501088171, now seen corresponding path program 1 times [2022-11-03 01:48:46,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:46,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546051909] [2022-11-03 01:48:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:46,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:47,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:47,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546051909] [2022-11-03 01:48:47,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546051909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:47,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:47,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:47,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328022419] [2022-11-03 01:48:47,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:47,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:47,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:47,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:47,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:47,041 INFO L87 Difference]: Start difference. First operand 1552 states and 2508 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2022-11-03 01:48:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:47,526 INFO L93 Difference]: Finished difference Result 3446 states and 5573 transitions. [2022-11-03 01:48:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:47,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 204 [2022-11-03 01:48:47,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:47,539 INFO L225 Difference]: With dead ends: 3446 [2022-11-03 01:48:47,540 INFO L226 Difference]: Without dead ends: 2400 [2022-11-03 01:48:47,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:47,549 INFO L413 NwaCegarLoop]: 1025 mSDtfsCounter, 199 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:47,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1915 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:47,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-11-03 01:48:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2398. [2022-11-03 01:48:47,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 1.6157697121401753) internal successors, (3873), 2397 states have internal predecessors, (3873), 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) [2022-11-03 01:48:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 3873 transitions. [2022-11-03 01:48:47,821 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 3873 transitions. Word has length 204 [2022-11-03 01:48:47,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:47,821 INFO L495 AbstractCegarLoop]: Abstraction has 2398 states and 3873 transitions. [2022-11-03 01:48:47,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2022-11-03 01:48:47,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 3873 transitions. [2022-11-03 01:48:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-03 01:48:47,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:47,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:47,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:48:47,826 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:47,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1506289072, now seen corresponding path program 1 times [2022-11-03 01:48:47,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:47,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106669898] [2022-11-03 01:48:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:48,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:48,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106669898] [2022-11-03 01:48:48,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106669898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:48,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:48,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:48,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146051496] [2022-11-03 01:48:48,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:48,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:48,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:48,096 INFO L87 Difference]: Start difference. First operand 2398 states and 3873 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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) [2022-11-03 01:48:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:48,637 INFO L93 Difference]: Finished difference Result 5359 states and 8653 transitions. [2022-11-03 01:48:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:48,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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 206 [2022-11-03 01:48:48,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:48,652 INFO L225 Difference]: With dead ends: 5359 [2022-11-03 01:48:48,652 INFO L226 Difference]: Without dead ends: 3467 [2022-11-03 01:48:48,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:48,656 INFO L413 NwaCegarLoop]: 936 mSDtfsCounter, 198 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:48,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 1820 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3467 states. [2022-11-03 01:48:49,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3467 to 3465. [2022-11-03 01:48:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3464 states have (on average 1.6131639722863742) internal successors, (5588), 3464 states have internal predecessors, (5588), 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) [2022-11-03 01:48:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5588 transitions. [2022-11-03 01:48:49,051 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5588 transitions. Word has length 206 [2022-11-03 01:48:49,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:49,052 INFO L495 AbstractCegarLoop]: Abstraction has 3465 states and 5588 transitions. [2022-11-03 01:48:49,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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) [2022-11-03 01:48:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5588 transitions. [2022-11-03 01:48:49,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-03 01:48:49,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:49,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:49,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:48:49,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:49,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:49,057 INFO L85 PathProgramCache]: Analyzing trace with hash 816692557, now seen corresponding path program 1 times [2022-11-03 01:48:49,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:49,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802745265] [2022-11-03 01:48:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:49,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:49,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:49,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802745265] [2022-11-03 01:48:49,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802745265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:49,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:49,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:49,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102955852] [2022-11-03 01:48:49,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:49,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:49,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:49,225 INFO L87 Difference]: Start difference. First operand 3465 states and 5588 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2022-11-03 01:48:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:50,227 INFO L93 Difference]: Finished difference Result 8743 states and 14113 transitions. [2022-11-03 01:48:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:50,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 210 [2022-11-03 01:48:50,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:50,251 INFO L225 Difference]: With dead ends: 8743 [2022-11-03 01:48:50,252 INFO L226 Difference]: Without dead ends: 5807 [2022-11-03 01:48:50,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:50,258 INFO L413 NwaCegarLoop]: 989 mSDtfsCounter, 192 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:50,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1880 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:50,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5807 states. [2022-11-03 01:48:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5807 to 5805. [2022-11-03 01:48:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5805 states, 5804 states have (on average 1.6109579600275672) internal successors, (9350), 5804 states have internal predecessors, (9350), 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) [2022-11-03 01:48:50,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5805 states to 5805 states and 9350 transitions. [2022-11-03 01:48:50,863 INFO L78 Accepts]: Start accepts. Automaton has 5805 states and 9350 transitions. Word has length 210 [2022-11-03 01:48:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:50,863 INFO L495 AbstractCegarLoop]: Abstraction has 5805 states and 9350 transitions. [2022-11-03 01:48:50,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2022-11-03 01:48:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5805 states and 9350 transitions. [2022-11-03 01:48:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-03 01:48:50,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:50,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:50,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:48:50,868 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:50,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1707550700, now seen corresponding path program 1 times [2022-11-03 01:48:50,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:50,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695367592] [2022-11-03 01:48:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:50,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:51,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:51,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695367592] [2022-11-03 01:48:51,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695367592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:51,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:51,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:51,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512091960] [2022-11-03 01:48:51,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:51,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:51,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:51,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:51,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:51,139 INFO L87 Difference]: Start difference. First operand 5805 states and 9350 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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) [2022-11-03 01:48:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:52,138 INFO L93 Difference]: Finished difference Result 14040 states and 22617 transitions. [2022-11-03 01:48:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:52,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 212 [2022-11-03 01:48:52,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:52,194 INFO L225 Difference]: With dead ends: 14040 [2022-11-03 01:48:52,195 INFO L226 Difference]: Without dead ends: 8764 [2022-11-03 01:48:52,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:52,204 INFO L413 NwaCegarLoop]: 937 mSDtfsCounter, 191 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:52,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1822 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2022-11-03 01:48:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 8762. [2022-11-03 01:48:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8762 states, 8761 states have (on average 1.6084921812578472) internal successors, (14092), 8761 states have internal predecessors, (14092), 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) [2022-11-03 01:48:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8762 states to 8762 states and 14092 transitions. [2022-11-03 01:48:53,353 INFO L78 Accepts]: Start accepts. Automaton has 8762 states and 14092 transitions. Word has length 212 [2022-11-03 01:48:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:53,354 INFO L495 AbstractCegarLoop]: Abstraction has 8762 states and 14092 transitions. [2022-11-03 01:48:53,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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) [2022-11-03 01:48:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8762 states and 14092 transitions. [2022-11-03 01:48:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-03 01:48:53,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:53,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:53,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:48:53,359 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:53,359 INFO L85 PathProgramCache]: Analyzing trace with hash 329789359, now seen corresponding path program 1 times [2022-11-03 01:48:53,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:53,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213008016] [2022-11-03 01:48:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:53,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:53,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:53,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213008016] [2022-11-03 01:48:53,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213008016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:53,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:53,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:53,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125049611] [2022-11-03 01:48:53,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:53,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:53,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:53,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:53,595 INFO L87 Difference]: Start difference. First operand 8762 states and 14092 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2022-11-03 01:48:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:55,159 INFO L93 Difference]: Finished difference Result 23400 states and 37665 transitions. [2022-11-03 01:48:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:55,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 216 [2022-11-03 01:48:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:55,209 INFO L225 Difference]: With dead ends: 23400 [2022-11-03 01:48:55,210 INFO L226 Difference]: Without dead ends: 15190 [2022-11-03 01:48:55,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:55,224 INFO L413 NwaCegarLoop]: 953 mSDtfsCounter, 185 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:55,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1845 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:55,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15190 states. [2022-11-03 01:48:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15190 to 15188. [2022-11-03 01:48:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15188 states, 15187 states have (on average 1.6052544939751103) internal successors, (24379), 15187 states have internal predecessors, (24379), 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) [2022-11-03 01:48:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15188 states to 15188 states and 24379 transitions. [2022-11-03 01:48:56,983 INFO L78 Accepts]: Start accepts. Automaton has 15188 states and 24379 transitions. Word has length 216 [2022-11-03 01:48:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:56,984 INFO L495 AbstractCegarLoop]: Abstraction has 15188 states and 24379 transitions. [2022-11-03 01:48:56,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2022-11-03 01:48:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 15188 states and 24379 transitions. [2022-11-03 01:48:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 01:48:56,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:56,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:56,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:48:56,989 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:56,990 INFO L85 PathProgramCache]: Analyzing trace with hash -859099888, now seen corresponding path program 1 times [2022-11-03 01:48:56,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:56,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721995377] [2022-11-03 01:48:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:56,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:57,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:57,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721995377] [2022-11-03 01:48:57,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721995377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:57,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:57,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:57,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137507392] [2022-11-03 01:48:57,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:57,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:57,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:57,180 INFO L87 Difference]: Start difference. First operand 15188 states and 24379 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2022-11-03 01:48:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:58,978 INFO L93 Difference]: Finished difference Result 38057 states and 61109 transitions. [2022-11-03 01:48:58,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:58,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 218 [2022-11-03 01:48:58,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:59,045 INFO L225 Difference]: With dead ends: 38057 [2022-11-03 01:48:59,045 INFO L226 Difference]: Without dead ends: 23421 [2022-11-03 01:48:59,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:59,063 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 184 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:59,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1824 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23421 states. [2022-11-03 01:49:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23421 to 23419. [2022-11-03 01:49:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23419 states, 23418 states have (on average 1.6028695874967973) internal successors, (37536), 23418 states have internal predecessors, (37536), 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) [2022-11-03 01:49:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23419 states to 23419 states and 37536 transitions. [2022-11-03 01:49:01,314 INFO L78 Accepts]: Start accepts. Automaton has 23419 states and 37536 transitions. Word has length 218 [2022-11-03 01:49:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:01,315 INFO L495 AbstractCegarLoop]: Abstraction has 23419 states and 37536 transitions. [2022-11-03 01:49:01,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2022-11-03 01:49:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 23419 states and 37536 transitions. [2022-11-03 01:49:01,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 01:49:01,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:01,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:01,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 01:49:01,320 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:01,321 INFO L85 PathProgramCache]: Analyzing trace with hash -926029843, now seen corresponding path program 1 times [2022-11-03 01:49:01,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:01,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721563643] [2022-11-03 01:49:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:01,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:01,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:01,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721563643] [2022-11-03 01:49:01,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721563643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:01,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:01,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:49:01,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420294453] [2022-11-03 01:49:01,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:01,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:49:01,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:49:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:01,643 INFO L87 Difference]: Start difference. First operand 23419 states and 37536 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 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) [2022-11-03 01:49:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:06,089 INFO L93 Difference]: Finished difference Result 57656 states and 92288 transitions. [2022-11-03 01:49:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:49:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 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 222 [2022-11-03 01:49:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:06,175 INFO L225 Difference]: With dead ends: 57656 [2022-11-03 01:49:06,176 INFO L226 Difference]: Without dead ends: 34812 [2022-11-03 01:49:06,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:49:06,203 INFO L413 NwaCegarLoop]: 945 mSDtfsCounter, 1999 mSDsluCounter, 8607 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1999 SdHoareTripleChecker+Valid, 9217 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:06,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1999 Valid, 9217 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 01:49:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34812 states. [2022-11-03 01:49:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34812 to 34794. [2022-11-03 01:49:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34794 states, 34793 states have (on average 1.5943436898226655) internal successors, (55472), 34793 states have internal predecessors, (55472), 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) [2022-11-03 01:49:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34794 states to 34794 states and 55472 transitions. [2022-11-03 01:49:09,591 INFO L78 Accepts]: Start accepts. Automaton has 34794 states and 55472 transitions. Word has length 222 [2022-11-03 01:49:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:09,592 INFO L495 AbstractCegarLoop]: Abstraction has 34794 states and 55472 transitions. [2022-11-03 01:49:09,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 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) [2022-11-03 01:49:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 34794 states and 55472 transitions. [2022-11-03 01:49:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-03 01:49:09,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:09,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:09,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 01:49:09,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:09,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1286226212, now seen corresponding path program 1 times [2022-11-03 01:49:09,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:09,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132242595] [2022-11-03 01:49:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:09,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:09,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:09,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132242595] [2022-11-03 01:49:09,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132242595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:09,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:09,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:09,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75520699] [2022-11-03 01:49:09,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:09,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:09,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:09,795 INFO L87 Difference]: Start difference. First operand 34794 states and 55472 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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) [2022-11-03 01:49:13,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:13,332 INFO L93 Difference]: Finished difference Result 69015 states and 110022 transitions. [2022-11-03 01:49:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:49:13,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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 223 [2022-11-03 01:49:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:13,395 INFO L225 Difference]: With dead ends: 69015 [2022-11-03 01:49:13,396 INFO L226 Difference]: Without dead ends: 34796 [2022-11-03 01:49:13,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:13,428 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 388 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 2742 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:13,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 2742 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:13,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34796 states. [2022-11-03 01:49:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34796 to 34794. [2022-11-03 01:49:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34794 states, 34793 states have (on average 1.5915845141264047) internal successors, (55376), 34793 states have internal predecessors, (55376), 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) [2022-11-03 01:49:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34794 states to 34794 states and 55376 transitions. [2022-11-03 01:49:16,833 INFO L78 Accepts]: Start accepts. Automaton has 34794 states and 55376 transitions. Word has length 223 [2022-11-03 01:49:16,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:16,834 INFO L495 AbstractCegarLoop]: Abstraction has 34794 states and 55376 transitions. [2022-11-03 01:49:16,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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) [2022-11-03 01:49:16,834 INFO L276 IsEmpty]: Start isEmpty. Operand 34794 states and 55376 transitions. [2022-11-03 01:49:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-11-03 01:49:16,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:16,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:16,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 01:49:16,837 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1151245204, now seen corresponding path program 1 times [2022-11-03 01:49:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:16,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953540642] [2022-11-03 01:49:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:16,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:17,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:17,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953540642] [2022-11-03 01:49:17,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953540642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:17,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:17,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298340637] [2022-11-03 01:49:17,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:17,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:17,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:17,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:17,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:17,033 INFO L87 Difference]: Start difference. First operand 34794 states and 55376 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2022-11-03 01:49:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:20,447 INFO L93 Difference]: Finished difference Result 69015 states and 109830 transitions. [2022-11-03 01:49:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:49:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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 224 [2022-11-03 01:49:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:20,508 INFO L225 Difference]: With dead ends: 69015 [2022-11-03 01:49:20,508 INFO L226 Difference]: Without dead ends: 34796 [2022-11-03 01:49:20,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:20,540 INFO L413 NwaCegarLoop]: 932 mSDtfsCounter, 396 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:20,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2748 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:20,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34796 states. [2022-11-03 01:49:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34796 to 34794. [2022-11-03 01:49:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34794 states, 34793 states have (on average 1.588825338430144) internal successors, (55280), 34793 states have internal predecessors, (55280), 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) [2022-11-03 01:49:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34794 states to 34794 states and 55280 transitions. [2022-11-03 01:49:23,894 INFO L78 Accepts]: Start accepts. Automaton has 34794 states and 55280 transitions. Word has length 224 [2022-11-03 01:49:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:23,894 INFO L495 AbstractCegarLoop]: Abstraction has 34794 states and 55280 transitions. [2022-11-03 01:49:23,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2022-11-03 01:49:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 34794 states and 55280 transitions. [2022-11-03 01:49:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-03 01:49:23,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:23,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:23,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 01:49:23,897 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:23,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1266359275, now seen corresponding path program 1 times [2022-11-03 01:49:23,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:23,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480922559] [2022-11-03 01:49:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:23,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:24,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:24,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480922559] [2022-11-03 01:49:24,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480922559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:24,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:24,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:24,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116251886] [2022-11-03 01:49:24,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:24,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:24,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:24,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:24,087 INFO L87 Difference]: Start difference. First operand 34794 states and 55280 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 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)