./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60c415120e2678b24f3b884ebcebefc19905a98d476a557ead28c297441bd0dd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 16:06:20,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:06:20,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:06:20,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:06:20,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:06:20,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:06:20,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:06:20,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:06:20,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:06:20,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:06:20,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:06:20,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:06:20,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:06:20,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:06:20,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:06:20,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:06:20,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:06:20,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:06:20,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:06:20,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:06:20,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:06:20,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:06:20,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:06:20,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:06:20,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:06:20,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:06:20,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:06:20,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:06:20,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:06:20,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:06:20,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:06:20,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:06:20,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:06:20,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:06:20,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:06:20,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:06:20,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:06:20,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:06:20,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:06:20,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:06:20,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:06:20,277 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 16:06:20,312 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:06:20,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:06:20,314 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:06:20,314 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:06:20,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:06:20,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:06:20,315 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:06:20,316 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:06:20,316 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:06:20,316 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:06:20,317 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:06:20,318 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:06:20,318 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:06:20,318 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:06:20,319 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:06:20,319 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:06:20,319 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:06:20,319 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:06:20,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:06:20,321 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:06:20,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:06:20,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:06:20,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:06:20,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:06:20,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:06:20,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:06:20,322 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:06:20,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:06:20,323 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:06:20,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:06:20,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:06:20,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:06:20,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:06:20,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:06:20,324 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:06:20,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:06:20,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:06:20,325 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:06:20,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:06:20,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:06:20,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:06:20,326 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_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60c415120e2678b24f3b884ebcebefc19905a98d476a557ead28c297441bd0dd [2022-11-23 16:06:20,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:06:20,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:06:20,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:06:20,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:06:20,675 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:06:20,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-23 16:06:23,780 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:06:24,016 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:06:24,017 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-23 16:06:24,042 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/data/5dd08fbe1/031a0de3a87d4d2d83a26e52532c7f6e/FLAG3ec6a1e6a [2022-11-23 16:06:24,056 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/data/5dd08fbe1/031a0de3a87d4d2d83a26e52532c7f6e [2022-11-23 16:06:24,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:06:24,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:06:24,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:06:24,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:06:24,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:06:24,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae6a1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24, skipping insertion in model container [2022-11-23 16:06:24,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:06:24,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:06:24,437 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2022-11-23 16:06:24,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:06:24,549 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:06:24,639 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2022-11-23 16:06:24,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:06:24,710 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:06:24,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24 WrapperNode [2022-11-23 16:06:24,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:06:24,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:06:24,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:06:24,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:06:24,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,812 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1297 [2022-11-23 16:06:24,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:06:24,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:06:24,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:06:24,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:06:24,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,864 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:06:24,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:06:24,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:06:24,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:06:24,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (1/1) ... [2022-11-23 16:06:24,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:06:24,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:06:24,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:06:24,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:06:24,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:06:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:06:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:06:24,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:06:25,239 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:06:25,241 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:06:26,382 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:06:26,783 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:06:26,784 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 16:06:26,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:06:26 BoogieIcfgContainer [2022-11-23 16:06:26,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:06:26,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:06:26,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:06:26,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:06:26,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:06:24" (1/3) ... [2022-11-23 16:06:26,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666b59a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:06:26, skipping insertion in model container [2022-11-23 16:06:26,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:24" (2/3) ... [2022-11-23 16:06:26,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666b59a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:06:26, skipping insertion in model container [2022-11-23 16:06:26,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:06:26" (3/3) ... [2022-11-23 16:06:26,799 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-23 16:06:26,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:06:26,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:06:26,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:06:26,911 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;@1860ef83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:06:26,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 16:06:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 253 states have (on average 1.6798418972332017) internal successors, (425), 254 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 16:06:26,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:26,937 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] [2022-11-23 16:06:26,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:26,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:26,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1325608003, now seen corresponding path program 1 times [2022-11-23 16:06:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:26,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952080190] [2022-11-23 16:06:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:26,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:27,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:27,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952080190] [2022-11-23 16:06:27,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952080190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:27,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:27,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:06:27,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980093920] [2022-11-23 16:06:27,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:27,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:27,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:27,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:27,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:27,620 INFO L87 Difference]: Start difference. First operand has 255 states, 253 states have (on average 1.6798418972332017) internal successors, (425), 254 states have internal predecessors, (425), 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 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:27,907 INFO L93 Difference]: Finished difference Result 420 states and 690 transitions. [2022-11-23 16:06:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:27,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 101 [2022-11-23 16:06:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:27,928 INFO L225 Difference]: With dead ends: 420 [2022-11-23 16:06:27,929 INFO L226 Difference]: Without dead ends: 325 [2022-11-23 16:06:27,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:27,938 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 147 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:27,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 858 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:06:27,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-23 16:06:28,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2022-11-23 16:06:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5372670807453417) internal successors, (495), 322 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 495 transitions. [2022-11-23 16:06:28,034 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 495 transitions. Word has length 101 [2022-11-23 16:06:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:28,035 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 495 transitions. [2022-11-23 16:06:28,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 495 transitions. [2022-11-23 16:06:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-23 16:06:28,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:28,038 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] [2022-11-23 16:06:28,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:06:28,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:28,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash 672364081, now seen corresponding path program 1 times [2022-11-23 16:06:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:28,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62349761] [2022-11-23 16:06:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:28,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:28,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:28,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62349761] [2022-11-23 16:06:28,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62349761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:28,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:28,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:06:28,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408617106] [2022-11-23 16:06:28,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:28,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:28,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:28,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:28,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:28,289 INFO L87 Difference]: Start difference. First operand 323 states and 495 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:28,437 INFO L93 Difference]: Finished difference Result 571 states and 897 transitions. [2022-11-23 16:06:28,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:28,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 103 [2022-11-23 16:06:28,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:28,441 INFO L225 Difference]: With dead ends: 571 [2022-11-23 16:06:28,441 INFO L226 Difference]: Without dead ends: 412 [2022-11-23 16:06:28,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:28,444 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 136 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:28,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 655 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-23 16:06:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 410. [2022-11-23 16:06:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.547677261613692) internal successors, (633), 409 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 633 transitions. [2022-11-23 16:06:28,471 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 633 transitions. Word has length 103 [2022-11-23 16:06:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:28,472 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 633 transitions. [2022-11-23 16:06:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 633 transitions. [2022-11-23 16:06:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-23 16:06:28,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:28,475 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] [2022-11-23 16:06:28,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:06:28,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1922675800, now seen corresponding path program 1 times [2022-11-23 16:06:28,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:28,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40145783] [2022-11-23 16:06:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:28,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:28,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40145783] [2022-11-23 16:06:28,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40145783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:28,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:28,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:06:28,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479422238] [2022-11-23 16:06:28,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:28,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:28,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:28,614 INFO L87 Difference]: Start difference. First operand 410 states and 633 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:28,764 INFO L93 Difference]: Finished difference Result 849 states and 1344 transitions. [2022-11-23 16:06:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:28,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2022-11-23 16:06:28,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:28,768 INFO L225 Difference]: With dead ends: 849 [2022-11-23 16:06:28,768 INFO L226 Difference]: Without dead ends: 604 [2022-11-23 16:06:28,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:28,771 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 136 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:28,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 745 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-11-23 16:06:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 602. [2022-11-23 16:06:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 1.5707154742096505) internal successors, (944), 601 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 944 transitions. [2022-11-23 16:06:28,819 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 944 transitions. Word has length 106 [2022-11-23 16:06:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:28,820 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 944 transitions. [2022-11-23 16:06:28,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 944 transitions. [2022-11-23 16:06:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-23 16:06:28,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:28,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:28,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:06:28,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:28,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1327867533, now seen corresponding path program 1 times [2022-11-23 16:06:28,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:28,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717255491] [2022-11-23 16:06:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:28,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:29,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717255491] [2022-11-23 16:06:29,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717255491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:29,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:29,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:06:29,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571234064] [2022-11-23 16:06:29,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:29,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:29,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:29,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:29,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:29,014 INFO L87 Difference]: Start difference. First operand 602 states and 944 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:29,223 INFO L93 Difference]: Finished difference Result 1302 states and 2074 transitions. [2022-11-23 16:06:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:29,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-23 16:06:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:29,228 INFO L225 Difference]: With dead ends: 1302 [2022-11-23 16:06:29,228 INFO L226 Difference]: Without dead ends: 865 [2022-11-23 16:06:29,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:29,230 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 135 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:29,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 671 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-23 16:06:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2022-11-23 16:06:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.5812064965197217) internal successors, (1363), 862 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1363 transitions. [2022-11-23 16:06:29,297 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1363 transitions. Word has length 108 [2022-11-23 16:06:29,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:29,298 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1363 transitions. [2022-11-23 16:06:29,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:29,298 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1363 transitions. [2022-11-23 16:06:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 16:06:29,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:29,299 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] [2022-11-23 16:06:29,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:06:29,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:29,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1064008304, now seen corresponding path program 1 times [2022-11-23 16:06:29,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:29,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657410378] [2022-11-23 16:06:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:29,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:29,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:29,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657410378] [2022-11-23 16:06:29,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657410378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:29,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:29,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:06:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172627115] [2022-11-23 16:06:29,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:29,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:29,406 INFO L87 Difference]: Start difference. First operand 863 states and 1363 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:29,644 INFO L93 Difference]: Finished difference Result 2070 states and 3318 transitions. [2022-11-23 16:06:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:29,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 111 [2022-11-23 16:06:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:29,651 INFO L225 Difference]: With dead ends: 2070 [2022-11-23 16:06:29,651 INFO L226 Difference]: Without dead ends: 1390 [2022-11-23 16:06:29,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:29,654 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 130 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:29,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 718 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2022-11-23 16:06:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1388. [2022-11-23 16:06:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 1.592645998558039) internal successors, (2209), 1387 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2209 transitions. [2022-11-23 16:06:29,880 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2209 transitions. Word has length 111 [2022-11-23 16:06:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:29,882 INFO L495 AbstractCegarLoop]: Abstraction has 1388 states and 2209 transitions. [2022-11-23 16:06:29,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2209 transitions. [2022-11-23 16:06:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 16:06:29,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:29,891 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] [2022-11-23 16:06:29,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:06:29,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:29,892 INFO L85 PathProgramCache]: Analyzing trace with hash -877927785, now seen corresponding path program 1 times [2022-11-23 16:06:29,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:29,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606438206] [2022-11-23 16:06:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:29,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:30,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:30,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606438206] [2022-11-23 16:06:30,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606438206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:30,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:30,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:06:30,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977466920] [2022-11-23 16:06:30,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:30,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:30,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:30,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:30,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:30,066 INFO L87 Difference]: Start difference. First operand 1388 states and 2209 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:30,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:30,424 INFO L93 Difference]: Finished difference Result 3291 states and 5280 transitions. [2022-11-23 16:06:30,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:30,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 113 [2022-11-23 16:06:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:30,433 INFO L225 Difference]: With dead ends: 3291 [2022-11-23 16:06:30,433 INFO L226 Difference]: Without dead ends: 2086 [2022-11-23 16:06:30,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:30,436 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 129 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:30,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 673 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2022-11-23 16:06:30,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 2084. [2022-11-23 16:06:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 1.5962554008641383) internal successors, (3325), 2083 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3325 transitions. [2022-11-23 16:06:30,657 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3325 transitions. Word has length 113 [2022-11-23 16:06:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:30,657 INFO L495 AbstractCegarLoop]: Abstraction has 2084 states and 3325 transitions. [2022-11-23 16:06:30,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3325 transitions. [2022-11-23 16:06:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 16:06:30,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:30,660 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] [2022-11-23 16:06:30,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:06:30,660 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2114041290, now seen corresponding path program 1 times [2022-11-23 16:06:30,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:30,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239678772] [2022-11-23 16:06:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:30,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:30,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:30,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239678772] [2022-11-23 16:06:30,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239678772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:30,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:30,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:06:30,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643433741] [2022-11-23 16:06:30,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:30,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:30,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:30,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:30,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:30,763 INFO L87 Difference]: Start difference. First operand 2084 states and 3325 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:31,293 INFO L93 Difference]: Finished difference Result 5391 states and 8664 transitions. [2022-11-23 16:06:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:31,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 116 [2022-11-23 16:06:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:31,308 INFO L225 Difference]: With dead ends: 5391 [2022-11-23 16:06:31,308 INFO L226 Difference]: Without dead ends: 3508 [2022-11-23 16:06:31,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:31,319 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 124 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:31,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 691 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2022-11-23 16:06:31,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3506. [2022-11-23 16:06:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.5982881597717546) internal successors, (5602), 3505 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 5602 transitions. [2022-11-23 16:06:31,753 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 5602 transitions. Word has length 116 [2022-11-23 16:06:31,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:31,753 INFO L495 AbstractCegarLoop]: Abstraction has 3506 states and 5602 transitions. [2022-11-23 16:06:31,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 5602 transitions. [2022-11-23 16:06:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 16:06:31,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:31,756 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] [2022-11-23 16:06:31,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 16:06:31,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:31,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:31,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2139714335, now seen corresponding path program 1 times [2022-11-23 16:06:31,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:31,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967435973] [2022-11-23 16:06:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:31,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:31,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:31,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967435973] [2022-11-23 16:06:31,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967435973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:31,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:31,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:06:31,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468303051] [2022-11-23 16:06:31,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:31,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:31,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:31,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:31,968 INFO L87 Difference]: Start difference. First operand 3506 states and 5602 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:32,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:32,713 INFO L93 Difference]: Finished difference Result 8712 states and 13974 transitions. [2022-11-23 16:06:32,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:32,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 118 [2022-11-23 16:06:32,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:32,734 INFO L225 Difference]: With dead ends: 8712 [2022-11-23 16:06:32,734 INFO L226 Difference]: Without dead ends: 5407 [2022-11-23 16:06:32,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:32,740 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 123 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:32,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 675 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2022-11-23 16:06:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 5405. [2022-11-23 16:06:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 5404 states have (on average 1.5978904515173946) internal successors, (8635), 5404 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 8635 transitions. [2022-11-23 16:06:33,340 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 8635 transitions. Word has length 118 [2022-11-23 16:06:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:33,341 INFO L495 AbstractCegarLoop]: Abstraction has 5405 states and 8635 transitions. [2022-11-23 16:06:33,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 8635 transitions. [2022-11-23 16:06:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 16:06:33,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:33,343 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] [2022-11-23 16:06:33,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 16:06:33,344 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:33,344 INFO L85 PathProgramCache]: Analyzing trace with hash 949471684, now seen corresponding path program 1 times [2022-11-23 16:06:33,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:33,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044696374] [2022-11-23 16:06:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:33,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:33,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:33,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044696374] [2022-11-23 16:06:33,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044696374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:33,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:33,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 16:06:33,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829742591] [2022-11-23 16:06:33,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:33,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:06:33,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:33,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:06:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:06:33,577 INFO L87 Difference]: Start difference. First operand 5405 states and 8635 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:35,165 INFO L93 Difference]: Finished difference Result 13488 states and 21561 transitions. [2022-11-23 16:06:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:06:35,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 121 [2022-11-23 16:06:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:35,197 INFO L225 Difference]: With dead ends: 13488 [2022-11-23 16:06:35,197 INFO L226 Difference]: Without dead ends: 8302 [2022-11-23 16:06:35,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:06:35,204 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1045 mSDsluCounter, 2747 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:35,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 3105 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 16:06:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8302 states. [2022-11-23 16:06:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8302 to 8288. [2022-11-23 16:06:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5888741402196211) internal successors, (13167), 8287 states have internal predecessors, (13167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13167 transitions. [2022-11-23 16:06:36,135 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13167 transitions. Word has length 121 [2022-11-23 16:06:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:36,136 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13167 transitions. [2022-11-23 16:06:36,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13167 transitions. [2022-11-23 16:06:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 16:06:36,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:36,139 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] [2022-11-23 16:06:36,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 16:06:36,139 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:36,144 INFO L85 PathProgramCache]: Analyzing trace with hash -698210882, now seen corresponding path program 1 times [2022-11-23 16:06:36,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:36,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999215072] [2022-11-23 16:06:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:36,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:36,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999215072] [2022-11-23 16:06:36,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999215072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:36,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:36,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:06:36,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906357796] [2022-11-23 16:06:36,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:36,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:06:36,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:36,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:06:36,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:06:36,293 INFO L87 Difference]: Start difference. First operand 8288 states and 13167 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:37,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:37,545 INFO L93 Difference]: Finished difference Result 16359 states and 26017 transitions. [2022-11-23 16:06:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:06:37,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 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 122 [2022-11-23 16:06:37,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:37,581 INFO L225 Difference]: With dead ends: 16359 [2022-11-23 16:06:37,581 INFO L226 Difference]: Without dead ends: 8290 [2022-11-23 16:06:37,593 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 [2022-11-23 16:06:37,594 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 255 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:37,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1006 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-23 16:06:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2022-11-23 16:06:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5847713285869434) internal successors, (13133), 8287 states have internal predecessors, (13133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13133 transitions. [2022-11-23 16:06:38,497 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13133 transitions. Word has length 122 [2022-11-23 16:06:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:38,497 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13133 transitions. [2022-11-23 16:06:38,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13133 transitions. [2022-11-23 16:06:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 16:06:38,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:38,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:38,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 16:06:38,500 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:38,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:38,501 INFO L85 PathProgramCache]: Analyzing trace with hash -232204853, now seen corresponding path program 1 times [2022-11-23 16:06:38,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:38,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979800500] [2022-11-23 16:06:38,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:38,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:38,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:38,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979800500] [2022-11-23 16:06:38,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979800500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:38,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:38,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:06:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130472038] [2022-11-23 16:06:38,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:38,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:06:38,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:38,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:06:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:06:38,634 INFO L87 Difference]: Start difference. First operand 8288 states and 13133 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:39,737 INFO L93 Difference]: Finished difference Result 16359 states and 25949 transitions. [2022-11-23 16:06:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:06:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-11-23 16:06:39,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:39,770 INFO L225 Difference]: With dead ends: 16359 [2022-11-23 16:06:39,771 INFO L226 Difference]: Without dead ends: 8290 [2022-11-23 16:06:39,778 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 [2022-11-23 16:06:39,778 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 263 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:39,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1012 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-23 16:06:40,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2022-11-23 16:06:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5806685169542658) internal successors, (13099), 8287 states have internal predecessors, (13099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13099 transitions. [2022-11-23 16:06:40,729 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13099 transitions. Word has length 123 [2022-11-23 16:06:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:40,730 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13099 transitions. [2022-11-23 16:06:40,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13099 transitions. [2022-11-23 16:06:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 16:06:40,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:40,732 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] [2022-11-23 16:06:40,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 16:06:40,733 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1333638181, now seen corresponding path program 1 times [2022-11-23 16:06:40,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:40,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351744561] [2022-11-23 16:06:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:40,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:40,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351744561] [2022-11-23 16:06:40,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351744561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:40,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:40,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:06:40,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347558198] [2022-11-23 16:06:40,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:40,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:06:40,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:40,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:06:40,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:06:40,883 INFO L87 Difference]: Start difference. First operand 8288 states and 13099 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:42,267 INFO L93 Difference]: Finished difference Result 16359 states and 25881 transitions. [2022-11-23 16:06:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:06:42,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 124 [2022-11-23 16:06:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:42,288 INFO L225 Difference]: With dead ends: 16359 [2022-11-23 16:06:42,289 INFO L226 Difference]: Without dead ends: 8290 [2022-11-23 16:06:42,297 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 [2022-11-23 16:06:42,298 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 261 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:42,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1015 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-23 16:06:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2022-11-23 16:06:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.576565705321588) internal successors, (13065), 8287 states have internal predecessors, (13065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13065 transitions. [2022-11-23 16:06:43,006 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13065 transitions. Word has length 124 [2022-11-23 16:06:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:43,006 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13065 transitions. [2022-11-23 16:06:43,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13065 transitions. [2022-11-23 16:06:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 16:06:43,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:43,009 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] [2022-11-23 16:06:43,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 16:06:43,009 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:43,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1660277294, now seen corresponding path program 1 times [2022-11-23 16:06:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:43,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353113578] [2022-11-23 16:06:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:43,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:43,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353113578] [2022-11-23 16:06:43,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353113578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:43,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:43,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:06:43,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725791851] [2022-11-23 16:06:43,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:43,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:06:43,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:43,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:06:43,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:06:43,184 INFO L87 Difference]: Start difference. First operand 8288 states and 13065 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:44,047 INFO L93 Difference]: Finished difference Result 16359 states and 25813 transitions. [2022-11-23 16:06:44,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:06:44,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 125 [2022-11-23 16:06:44,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:44,070 INFO L225 Difference]: With dead ends: 16359 [2022-11-23 16:06:44,070 INFO L226 Difference]: Without dead ends: 8290 [2022-11-23 16:06:44,081 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 [2022-11-23 16:06:44,082 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 259 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:44,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1018 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-23 16:06:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2022-11-23 16:06:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5724628936889102) internal successors, (13031), 8287 states have internal predecessors, (13031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13031 transitions. [2022-11-23 16:06:44,970 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13031 transitions. Word has length 125 [2022-11-23 16:06:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:44,971 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13031 transitions. [2022-11-23 16:06:44,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13031 transitions. [2022-11-23 16:06:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 16:06:44,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:44,973 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] [2022-11-23 16:06:44,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 16:06:44,973 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:44,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash 684049603, now seen corresponding path program 1 times [2022-11-23 16:06:44,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:44,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038040087] [2022-11-23 16:06:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:44,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:45,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:45,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038040087] [2022-11-23 16:06:45,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038040087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:45,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:45,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 16:06:45,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571700300] [2022-11-23 16:06:45,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:45,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:06:45,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:45,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:06:45,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:06:45,268 INFO L87 Difference]: Start difference. First operand 8288 states and 13031 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:46,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:46,284 INFO L93 Difference]: Finished difference Result 16359 states and 25745 transitions. [2022-11-23 16:06:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:06:46,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 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 127 [2022-11-23 16:06:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:46,300 INFO L225 Difference]: With dead ends: 16359 [2022-11-23 16:06:46,301 INFO L226 Difference]: Without dead ends: 8290 [2022-11-23 16:06:46,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:06:46,313 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 232 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:46,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1640 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:06:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-23 16:06:47,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2022-11-23 16:06:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5705321588029444) internal successors, (13015), 8287 states have internal predecessors, (13015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13015 transitions. [2022-11-23 16:06:47,666 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13015 transitions. Word has length 127 [2022-11-23 16:06:47,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:47,666 INFO L495 AbstractCegarLoop]: Abstraction has 8288 states and 13015 transitions. [2022-11-23 16:06:47,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13015 transitions. [2022-11-23 16:06:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:06:47,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:47,669 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] [2022-11-23 16:06:47,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 16:06:47,670 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:47,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:47,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1148518135, now seen corresponding path program 1 times [2022-11-23 16:06:47,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:47,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118783297] [2022-11-23 16:06:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:47,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:48,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:48,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118783297] [2022-11-23 16:06:48,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118783297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:48,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:48,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 16:06:48,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596235843] [2022-11-23 16:06:48,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:48,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:06:48,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:48,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:06:48,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:06:48,091 INFO L87 Difference]: Start difference. First operand 8288 states and 13015 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:49,826 INFO L93 Difference]: Finished difference Result 20553 states and 32209 transitions. [2022-11-23 16:06:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:06:49,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 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 130 [2022-11-23 16:06:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:49,848 INFO L225 Difference]: With dead ends: 20553 [2022-11-23 16:06:49,848 INFO L226 Difference]: Without dead ends: 12484 [2022-11-23 16:06:49,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:06:49,860 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 438 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:49,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1346 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:06:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2022-11-23 16:06:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12482. [2022-11-23 16:06:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12482 states, 12481 states have (on average 1.5613332265042865) internal successors, (19487), 12481 states have internal predecessors, (19487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12482 states to 12482 states and 19487 transitions. [2022-11-23 16:06:51,263 INFO L78 Accepts]: Start accepts. Automaton has 12482 states and 19487 transitions. Word has length 130 [2022-11-23 16:06:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:51,263 INFO L495 AbstractCegarLoop]: Abstraction has 12482 states and 19487 transitions. [2022-11-23 16:06:51,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 12482 states and 19487 transitions. [2022-11-23 16:06:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-23 16:06:51,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:51,265 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] [2022-11-23 16:06:51,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 16:06:51,265 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1277687264, now seen corresponding path program 1 times [2022-11-23 16:06:51,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:51,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114319279] [2022-11-23 16:06:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:51,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:51,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114319279] [2022-11-23 16:06:51,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114319279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:51,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:51,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 16:06:51,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784865457] [2022-11-23 16:06:51,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:51,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:06:51,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:51,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:06:51,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:06:51,821 INFO L87 Difference]: Start difference. First operand 12482 states and 19487 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:53,724 INFO L93 Difference]: Finished difference Result 15360 states and 23868 transitions. [2022-11-23 16:06:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:06:53,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 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 131 [2022-11-23 16:06:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:53,745 INFO L225 Difference]: With dead ends: 15360 [2022-11-23 16:06:53,745 INFO L226 Difference]: Without dead ends: 15358 [2022-11-23 16:06:53,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 16:06:53,751 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 371 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:53,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 2151 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:06:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15358 states. [2022-11-23 16:06:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15358 to 12496. [2022-11-23 16:06:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12496 states, 12495 states have (on average 1.5591036414565826) internal successors, (19481), 12495 states have internal predecessors, (19481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12496 states to 12496 states and 19481 transitions. [2022-11-23 16:06:55,003 INFO L78 Accepts]: Start accepts. Automaton has 12496 states and 19481 transitions. Word has length 131 [2022-11-23 16:06:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:55,004 INFO L495 AbstractCegarLoop]: Abstraction has 12496 states and 19481 transitions. [2022-11-23 16:06:55,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 12496 states and 19481 transitions. [2022-11-23 16:06:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-23 16:06:55,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:55,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:55,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 16:06:55,007 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:55,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:55,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1212519615, now seen corresponding path program 1 times [2022-11-23 16:06:55,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:55,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621529887] [2022-11-23 16:06:55,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:55,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:57,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:57,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621529887] [2022-11-23 16:06:57,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621529887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:06:57,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404486468] [2022-11-23 16:06:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:57,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:06:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:06:57,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:06:57,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:06:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:57,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 16:06:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:06:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 16:06:57,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:06:57,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404486468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:57,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:06:57,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [16] total 18 [2022-11-23 16:06:57,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437932240] [2022-11-23 16:06:57,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:57,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:06:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:06:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-11-23 16:06:57,770 INFO L87 Difference]: Start difference. First operand 12496 states and 19481 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:01,714 INFO L93 Difference]: Finished difference Result 36774 states and 57377 transitions. [2022-11-23 16:07:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:07:01,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-11-23 16:07:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:01,745 INFO L225 Difference]: With dead ends: 36774 [2022-11-23 16:07:01,745 INFO L226 Difference]: Without dead ends: 24495 [2022-11-23 16:07:01,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-23 16:07:01,755 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 817 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:01,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 745 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24495 states. [2022-11-23 16:07:04,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24495 to 24493. [2022-11-23 16:07:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24493 states, 24492 states have (on average 1.555528335783113) internal successors, (38098), 24492 states have internal predecessors, (38098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24493 states to 24493 states and 38098 transitions. [2022-11-23 16:07:04,716 INFO L78 Accepts]: Start accepts. Automaton has 24493 states and 38098 transitions. Word has length 139 [2022-11-23 16:07:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:04,716 INFO L495 AbstractCegarLoop]: Abstraction has 24493 states and 38098 transitions. [2022-11-23 16:07:04,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 24493 states and 38098 transitions. [2022-11-23 16:07:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-23 16:07:04,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:04,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:04,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:04,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:04,926 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:04,926 INFO L85 PathProgramCache]: Analyzing trace with hash 93144951, now seen corresponding path program 1 times [2022-11-23 16:07:04,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:04,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812962307] [2022-11-23 16:07:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:04,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 16:07:05,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:05,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812962307] [2022-11-23 16:07:05,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812962307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:05,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:05,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:05,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173613259] [2022-11-23 16:07:05,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:05,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:05,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:05,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:05,029 INFO L87 Difference]: Start difference. First operand 24493 states and 38098 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:11,396 INFO L93 Difference]: Finished difference Result 73403 states and 114171 transitions. [2022-11-23 16:07:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 141 [2022-11-23 16:07:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:11,472 INFO L225 Difference]: With dead ends: 73403 [2022-11-23 16:07:11,472 INFO L226 Difference]: Without dead ends: 48949 [2022-11-23 16:07:11,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:11,491 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 318 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:11,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 688 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48949 states. [2022-11-23 16:07:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48949 to 24500. [2022-11-23 16:07:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24500 states, 24499 states have (on average 1.5554512429078737) internal successors, (38107), 24499 states have internal predecessors, (38107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24500 states to 24500 states and 38107 transitions. [2022-11-23 16:07:15,542 INFO L78 Accepts]: Start accepts. Automaton has 24500 states and 38107 transitions. Word has length 141 [2022-11-23 16:07:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:15,542 INFO L495 AbstractCegarLoop]: Abstraction has 24500 states and 38107 transitions. [2022-11-23 16:07:15,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:15,543 INFO L276 IsEmpty]: Start isEmpty. Operand 24500 states and 38107 transitions. [2022-11-23 16:07:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-23 16:07:15,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:15,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:15,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 16:07:15,544 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:15,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1611567089, now seen corresponding path program 1 times [2022-11-23 16:07:15,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:15,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100173506] [2022-11-23 16:07:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:15,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:07:15,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:15,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100173506] [2022-11-23 16:07:15,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100173506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:15,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:15,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:15,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907897574] [2022-11-23 16:07:15,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:15,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:15,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:15,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:15,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:15,657 INFO L87 Difference]: Start difference. First operand 24500 states and 38107 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:23,275 INFO L93 Difference]: Finished difference Result 71871 states and 111866 transitions. [2022-11-23 16:07:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 141 [2022-11-23 16:07:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:23,347 INFO L225 Difference]: With dead ends: 71871 [2022-11-23 16:07:23,347 INFO L226 Difference]: Without dead ends: 47466 [2022-11-23 16:07:23,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:23,372 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 246 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:23,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 979 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47466 states. [2022-11-23 16:07:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47466 to 47464. [2022-11-23 16:07:32,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47464 states, 47463 states have (on average 1.5491646124349494) internal successors, (73528), 47463 states have internal predecessors, (73528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47464 states to 47464 states and 73528 transitions. [2022-11-23 16:07:32,639 INFO L78 Accepts]: Start accepts. Automaton has 47464 states and 73528 transitions. Word has length 141 [2022-11-23 16:07:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:32,639 INFO L495 AbstractCegarLoop]: Abstraction has 47464 states and 73528 transitions. [2022-11-23 16:07:32,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 47464 states and 73528 transitions. [2022-11-23 16:07:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-23 16:07:32,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:32,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:32,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 16:07:32,643 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2143711910, now seen corresponding path program 1 times [2022-11-23 16:07:32,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:32,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072032459] [2022-11-23 16:07:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:32,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:07:34,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072032459] [2022-11-23 16:07:34,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072032459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290289203] [2022-11-23 16:07:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:34,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:34,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:34,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:34,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c142ba6f-356f-4c91-9001-81003006d0bd/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:07:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 16:07:34,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:07:35,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:35,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290289203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:35,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:07:35,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [16] total 18 [2022-11-23 16:07:35,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932396333] [2022-11-23 16:07:35,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:35,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:07:35,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:35,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:07:35,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-11-23 16:07:35,148 INFO L87 Difference]: Start difference. First operand 47464 states and 73528 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 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)