./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52f505c2033e0aec4a19441e3af9fb9949b71da33ecc0d15d8cd0b9d7a123c92 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:29:10,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:29:10,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:29:10,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:29:10,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:29:10,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:29:10,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:29:10,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:29:10,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:29:10,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:29:10,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:29:10,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:29:10,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:29:10,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:29:10,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:29:10,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:29:10,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:29:10,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:29:10,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:29:10,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:29:10,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:29:10,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:29:10,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:29:10,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:29:10,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:29:10,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:29:10,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:29:10,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:29:10,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:29:10,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:29:10,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:29:10,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:29:10,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:29:10,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:29:10,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:29:10,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:29:10,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:29:10,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:29:10,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:29:10,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:29:10,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:29:10,218 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:29:10,253 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:29:10,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:29:10,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:29:10,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:29:10,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:29:10,256 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:29:10,256 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:29:10,256 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:29:10,257 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:29:10,257 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:29:10,258 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:29:10,258 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:29:10,258 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:29:10,259 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:29:10,259 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:29:10,259 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:29:10,260 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:29:10,260 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:29:10,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:29:10,261 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:29:10,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:29:10,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:29:10,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:29:10,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:29:10,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:29:10,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:29:10,263 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:29:10,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:29:10,264 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:29:10,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:29:10,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:29:10,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:29:10,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:29:10,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:29:10,265 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:29:10,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:29:10,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:29:10,266 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:29:10,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:29:10,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:29:10,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:29:10,267 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_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52f505c2033e0aec4a19441e3af9fb9949b71da33ecc0d15d8cd0b9d7a123c92 [2022-11-22 01:29:10,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:29:10,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:29:10,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:29:10,610 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:29:10,611 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:29:10,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-22 01:29:13,606 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:29:13,863 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:29:13,868 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-22 01:29:13,878 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/data/c337afb60/d47321f7bc97406080ae74793867c95f/FLAG727f5960b [2022-11-22 01:29:13,892 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/data/c337afb60/d47321f7bc97406080ae74793867c95f [2022-11-22 01:29:13,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:29:13,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:29:13,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:29:13,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:29:13,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:29:13,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:29:13" (1/1) ... [2022-11-22 01:29:13,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3493b350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:13, skipping insertion in model container [2022-11-22 01:29:13,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:29:13" (1/1) ... [2022-11-22 01:29:13,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:29:13,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:29:14,231 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_c7aa4841-fa2f-4c00-867e-021314a9ce96/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7836,7849] [2022-11-22 01:29:14,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:29:14,304 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:29:14,399 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_c7aa4841-fa2f-4c00-867e-021314a9ce96/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7836,7849] [2022-11-22 01:29:14,444 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:29:14,462 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:29:14,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14 WrapperNode [2022-11-22 01:29:14,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:29:14,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:29:14,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:29:14,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:29:14,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (1/1) ... [2022-11-22 01:29:14,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (1/1) ... [2022-11-22 01:29:14,540 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 618 [2022-11-22 01:29:14,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:29:14,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:29:14,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:29:14,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:29:14,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (1/1) ... [2022-11-22 01:29:14,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (1/1) ... [2022-11-22 01:29:14,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (1/1) ... [2022-11-22 01:29:14,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (1/1) ... [2022-11-22 01:29:14,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (1/1) ... [2022-11-22 01:29:14,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (1/1) ... [2022-11-22 01:29:14,576 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (1/1) ... [2022-11-22 01:29:14,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (1/1) ... [2022-11-22 01:29:14,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:29:14,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:29:14,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:29:14,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:29:14,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (1/1) ... [2022-11-22 01:29:14,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:29:14,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:14,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:29:14,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:29:14,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:29:14,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:29:14,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:29:14,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:29:14,816 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:29:14,818 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:29:15,501 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:29:15,743 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:29:15,743 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 01:29:15,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:29:15 BoogieIcfgContainer [2022-11-22 01:29:15,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:29:15,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:29:15,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:29:15,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:29:15,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:29:13" (1/3) ... [2022-11-22 01:29:15,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1771f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:29:15, skipping insertion in model container [2022-11-22 01:29:15,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:14" (2/3) ... [2022-11-22 01:29:15,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1771f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:29:15, skipping insertion in model container [2022-11-22 01:29:15,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:29:15" (3/3) ... [2022-11-22 01:29:15,756 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-22 01:29:15,774 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:29:15,775 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:29:15,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:29:15,853 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;@65f3d372, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:29:15,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:29:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 102 states have (on average 1.7647058823529411) internal successors, (180), 103 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 01:29:15,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:15,867 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] [2022-11-22 01:29:15,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:29:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:15,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1354527902, now seen corresponding path program 1 times [2022-11-22 01:29:15,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:15,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351445580] [2022-11-22 01:29:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:15,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:16,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:16,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351445580] [2022-11-22 01:29:16,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351445580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:16,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:16,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:29:16,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008729251] [2022-11-22 01:29:16,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:16,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:29:16,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:29:16,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:29:16,506 INFO L87 Difference]: Start difference. First operand has 104 states, 102 states have (on average 1.7647058823529411) internal successors, (180), 103 states have internal predecessors, (180), 0 states have call successors, (0), 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 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:16,778 INFO L93 Difference]: Finished difference Result 160 states and 263 transitions. [2022-11-22 01:29:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:29:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2022-11-22 01:29:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:16,792 INFO L225 Difference]: With dead ends: 160 [2022-11-22 01:29:16,793 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 01:29:16,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:29:16,802 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 407 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:16,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 175 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:29:16,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 01:29:16,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-22 01:29:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 101 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) [2022-11-22 01:29:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2022-11-22 01:29:16,868 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 64 [2022-11-22 01:29:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:16,869 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2022-11-22 01:29:16,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2022-11-22 01:29:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 01:29:16,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:16,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:29:16,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:29:16,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:29:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:16,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1546047899, now seen corresponding path program 1 times [2022-11-22 01:29:16,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:16,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144104766] [2022-11-22 01:29:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:16,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:17,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:17,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144104766] [2022-11-22 01:29:17,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144104766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:17,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:17,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:29:17,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743673457] [2022-11-22 01:29:17,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:17,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:29:17,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:17,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:29:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:29:17,207 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:17,325 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2022-11-22 01:29:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:29:17,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-22 01:29:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:17,326 INFO L225 Difference]: With dead ends: 160 [2022-11-22 01:29:17,327 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 01:29:17,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:29:17,329 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 299 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:17,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 80 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:29:17,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 01:29:17,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-22 01:29:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.198019801980198) internal successors, (121), 101 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) [2022-11-22 01:29:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2022-11-22 01:29:17,342 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 65 [2022-11-22 01:29:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:17,342 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2022-11-22 01:29:17,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2022-11-22 01:29:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 01:29:17,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:17,344 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] [2022-11-22 01:29:17,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:29:17,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:29:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1667749506, now seen corresponding path program 1 times [2022-11-22 01:29:17,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:17,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550670700] [2022-11-22 01:29:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:17,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:17,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550670700] [2022-11-22 01:29:17,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550670700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:17,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:17,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:29:17,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959752400] [2022-11-22 01:29:17,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:17,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:29:17,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:17,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:29:17,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:29:17,487 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:17,646 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2022-11-22 01:29:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:29:17,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-22 01:29:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:17,651 INFO L225 Difference]: With dead ends: 156 [2022-11-22 01:29:17,651 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 01:29:17,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:29:17,653 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 281 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:17,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 88 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:29:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 01:29:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-22 01:29:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-11-22 01:29:17,675 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 66 [2022-11-22 01:29:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:17,676 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-11-22 01:29:17,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-11-22 01:29:17,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 01:29:17,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:17,677 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] [2022-11-22 01:29:17,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:29:17,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:29:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:17,678 INFO L85 PathProgramCache]: Analyzing trace with hash 26149639, now seen corresponding path program 1 times [2022-11-22 01:29:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:17,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699724251] [2022-11-22 01:29:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:17,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:17,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:17,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699724251] [2022-11-22 01:29:17,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699724251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:17,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:17,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:29:17,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638706931] [2022-11-22 01:29:17,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:17,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:29:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:17,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:29:17,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:29:17,906 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:18,009 INFO L93 Difference]: Finished difference Result 164 states and 196 transitions. [2022-11-22 01:29:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:29:18,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-11-22 01:29:18,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:18,010 INFO L225 Difference]: With dead ends: 164 [2022-11-22 01:29:18,011 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 01:29:18,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:29:18,013 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 298 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:18,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 72 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:29:18,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 01:29:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-22 01:29:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2022-11-22 01:29:18,028 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 67 [2022-11-22 01:29:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:18,028 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2022-11-22 01:29:18,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2022-11-22 01:29:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 01:29:18,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:18,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:29:18,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:29:18,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:29:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1269573702, now seen corresponding path program 1 times [2022-11-22 01:29:18,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:18,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835755005] [2022-11-22 01:29:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:18,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:18,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:18,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835755005] [2022-11-22 01:29:18,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835755005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:18,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:18,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:29:18,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957043075] [2022-11-22 01:29:18,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:18,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:29:18,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:29:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:29:18,203 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:18,334 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2022-11-22 01:29:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:29:18,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-22 01:29:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:18,336 INFO L225 Difference]: With dead ends: 168 [2022-11-22 01:29:18,336 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 01:29:18,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:29:18,346 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 251 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:18,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 88 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:29:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 01:29:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-22 01:29:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 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) [2022-11-22 01:29:18,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2022-11-22 01:29:18,371 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 68 [2022-11-22 01:29:18,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:18,373 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2022-11-22 01:29:18,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2022-11-22 01:29:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-22 01:29:18,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:18,383 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] [2022-11-22 01:29:18,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:29:18,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:29:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:18,385 INFO L85 PathProgramCache]: Analyzing trace with hash 673313139, now seen corresponding path program 1 times [2022-11-22 01:29:18,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:18,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220234361] [2022-11-22 01:29:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:18,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:27,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:27,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220234361] [2022-11-22 01:29:27,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220234361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:27,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:27,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-11-22 01:29:27,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582024531] [2022-11-22 01:29:27,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:27,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 01:29:27,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:27,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 01:29:27,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:29:27,319 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:38,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:38,183 INFO L93 Difference]: Finished difference Result 254 states and 324 transitions. [2022-11-22 01:29:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-22 01:29:38,184 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2022-11-22 01:29:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:38,186 INFO L225 Difference]: With dead ends: 254 [2022-11-22 01:29:38,186 INFO L226 Difference]: Without dead ends: 216 [2022-11-22 01:29:38,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=914, Invalid=3118, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 01:29:38,189 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 834 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 2184 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:38,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 1046 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2184 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-22 01:29:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-22 01:29:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 138. [2022-11-22 01:29:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.2116788321167884) internal successors, (166), 137 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-11-22 01:29:38,224 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 69 [2022-11-22 01:29:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:38,224 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-11-22 01:29:38,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-11-22 01:29:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 01:29:38,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:38,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:29:38,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:29:38,226 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:29:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:38,227 INFO L85 PathProgramCache]: Analyzing trace with hash 778519218, now seen corresponding path program 1 times [2022-11-22 01:29:38,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:38,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67453197] [2022-11-22 01:29:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:38,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:29:50,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:50,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67453197] [2022-11-22 01:29:50,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67453197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:50,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:50,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-11-22 01:29:50,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920999003] [2022-11-22 01:29:50,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:50,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 01:29:50,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:50,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 01:29:50,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:29:50,404 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:04,217 INFO L93 Difference]: Finished difference Result 214 states and 269 transitions. [2022-11-22 01:30:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-22 01:30:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-22 01:30:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:04,224 INFO L225 Difference]: With dead ends: 214 [2022-11-22 01:30:04,224 INFO L226 Difference]: Without dead ends: 140 [2022-11-22 01:30:04,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=973, Invalid=3187, Unknown=0, NotChecked=0, Total=4160 [2022-11-22 01:30:04,231 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 692 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:04,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 921 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1728 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-22 01:30:04,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-22 01:30:04,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-11-22 01:30:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.2043795620437956) internal successors, (165), 137 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 165 transitions. [2022-11-22 01:30:04,281 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 165 transitions. Word has length 71 [2022-11-22 01:30:04,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:04,281 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 165 transitions. [2022-11-22 01:30:04,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 165 transitions. [2022-11-22 01:30:04,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 01:30:04,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:04,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:30:04,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:30:04,289 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:04,290 INFO L85 PathProgramCache]: Analyzing trace with hash 583328586, now seen corresponding path program 1 times [2022-11-22 01:30:04,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:04,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448616852] [2022-11-22 01:30:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:04,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:04,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:04,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448616852] [2022-11-22 01:30:04,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448616852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:04,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:04,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:30:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687368393] [2022-11-22 01:30:04,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:04,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:30:04,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:30:04,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:30:04,474 INFO L87 Difference]: Start difference. First operand 138 states and 165 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:04,585 INFO L93 Difference]: Finished difference Result 285 states and 366 transitions. [2022-11-22 01:30:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:30:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-22 01:30:04,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:04,590 INFO L225 Difference]: With dead ends: 285 [2022-11-22 01:30:04,590 INFO L226 Difference]: Without dead ends: 211 [2022-11-22 01:30:04,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:30:04,592 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 48 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:04,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 304 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:30:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-22 01:30:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2022-11-22 01:30:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.2596153846153846) internal successors, (262), 208 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 262 transitions. [2022-11-22 01:30:04,651 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 262 transitions. Word has length 71 [2022-11-22 01:30:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:04,652 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 262 transitions. [2022-11-22 01:30:04,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 262 transitions. [2022-11-22 01:30:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 01:30:04,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:04,653 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] [2022-11-22 01:30:04,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:30:04,653 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1624956121, now seen corresponding path program 1 times [2022-11-22 01:30:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:04,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360286284] [2022-11-22 01:30:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:04,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:04,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:04,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360286284] [2022-11-22 01:30:04,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360286284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:04,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:04,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:30:04,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923922170] [2022-11-22 01:30:04,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:04,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:30:04,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:30:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:30:04,916 INFO L87 Difference]: Start difference. First operand 209 states and 262 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:05,179 INFO L93 Difference]: Finished difference Result 402 states and 522 transitions. [2022-11-22 01:30:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:30:05,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-22 01:30:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:05,182 INFO L225 Difference]: With dead ends: 402 [2022-11-22 01:30:05,182 INFO L226 Difference]: Without dead ends: 328 [2022-11-22 01:30:05,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:30:05,185 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 242 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:05,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 595 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:30:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-22 01:30:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 172. [2022-11-22 01:30:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.2280701754385965) internal successors, (210), 171 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 210 transitions. [2022-11-22 01:30:05,240 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 210 transitions. Word has length 72 [2022-11-22 01:30:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:05,240 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 210 transitions. [2022-11-22 01:30:05,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 210 transitions. [2022-11-22 01:30:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-22 01:30:05,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:05,244 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] [2022-11-22 01:30:05,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:30:05,244 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash 420828594, now seen corresponding path program 1 times [2022-11-22 01:30:05,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:05,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974846127] [2022-11-22 01:30:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:05,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:05,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:05,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974846127] [2022-11-22 01:30:05,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974846127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:05,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:05,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:30:05,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847316760] [2022-11-22 01:30:05,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:05,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:05,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:05,392 INFO L87 Difference]: Start difference. First operand 172 states and 210 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:05,511 INFO L93 Difference]: Finished difference Result 337 states and 434 transitions. [2022-11-22 01:30:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:05,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2022-11-22 01:30:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:05,517 INFO L225 Difference]: With dead ends: 337 [2022-11-22 01:30:05,517 INFO L226 Difference]: Without dead ends: 229 [2022-11-22 01:30:05,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:05,518 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 43 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:05,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 233 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:30:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-22 01:30:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 215. [2022-11-22 01:30:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.2429906542056075) internal successors, (266), 214 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 266 transitions. [2022-11-22 01:30:05,587 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 266 transitions. Word has length 85 [2022-11-22 01:30:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:05,587 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 266 transitions. [2022-11-22 01:30:05,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 266 transitions. [2022-11-22 01:30:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 01:30:05,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:05,589 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] [2022-11-22 01:30:05,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:30:05,589 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1797378991, now seen corresponding path program 1 times [2022-11-22 01:30:05,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:05,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000120604] [2022-11-22 01:30:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:05,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:05,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:05,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000120604] [2022-11-22 01:30:05,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000120604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:05,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:05,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:30:05,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699244724] [2022-11-22 01:30:05,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:05,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:05,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:05,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:05,721 INFO L87 Difference]: Start difference. First operand 215 states and 266 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:05,863 INFO L93 Difference]: Finished difference Result 487 states and 634 transitions. [2022-11-22 01:30:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:05,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2022-11-22 01:30:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:05,866 INFO L225 Difference]: With dead ends: 487 [2022-11-22 01:30:05,866 INFO L226 Difference]: Without dead ends: 340 [2022-11-22 01:30:05,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:05,867 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 38 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:05,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 227 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:30:05,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-22 01:30:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 322. [2022-11-22 01:30:05,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.280373831775701) internal successors, (411), 321 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:05,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 411 transitions. [2022-11-22 01:30:05,973 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 411 transitions. Word has length 88 [2022-11-22 01:30:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:05,973 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 411 transitions. [2022-11-22 01:30:05,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 411 transitions. [2022-11-22 01:30:05,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-22 01:30:05,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:05,975 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] [2022-11-22 01:30:05,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:30:05,975 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1029946425, now seen corresponding path program 1 times [2022-11-22 01:30:05,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:05,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450405829] [2022-11-22 01:30:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:05,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:06,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:06,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450405829] [2022-11-22 01:30:06,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450405829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:06,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:06,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:30:06,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078730183] [2022-11-22 01:30:06,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:06,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:06,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:06,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:06,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:06,109 INFO L87 Difference]: Start difference. First operand 322 states and 411 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:06,326 INFO L93 Difference]: Finished difference Result 814 states and 1077 transitions. [2022-11-22 01:30:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:06,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2022-11-22 01:30:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:06,329 INFO L225 Difference]: With dead ends: 814 [2022-11-22 01:30:06,329 INFO L226 Difference]: Without dead ends: 560 [2022-11-22 01:30:06,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:06,330 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 33 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:06,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 220 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:30:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-22 01:30:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 530. [2022-11-22 01:30:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 1.3062381852551985) internal successors, (691), 529 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 691 transitions. [2022-11-22 01:30:06,504 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 691 transitions. Word has length 91 [2022-11-22 01:30:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:06,505 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 691 transitions. [2022-11-22 01:30:06,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 691 transitions. [2022-11-22 01:30:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 01:30:06,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:06,507 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] [2022-11-22 01:30:06,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:30:06,507 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash -880526621, now seen corresponding path program 1 times [2022-11-22 01:30:06,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:06,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602169077] [2022-11-22 01:30:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:06,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:06,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602169077] [2022-11-22 01:30:06,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602169077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:06,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:06,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:30:06,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772112900] [2022-11-22 01:30:06,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:06,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:06,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:06,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:06,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:06,656 INFO L87 Difference]: Start difference. First operand 530 states and 691 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:07,015 INFO L93 Difference]: Finished difference Result 1444 states and 1925 transitions. [2022-11-22 01:30:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:07,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2022-11-22 01:30:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:07,019 INFO L225 Difference]: With dead ends: 1444 [2022-11-22 01:30:07,020 INFO L226 Difference]: Without dead ends: 982 [2022-11-22 01:30:07,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:07,021 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 28 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:07,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 213 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:30:07,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-11-22 01:30:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 928. [2022-11-22 01:30:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.319309600862999) internal successors, (1223), 927 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1223 transitions. [2022-11-22 01:30:07,349 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1223 transitions. Word has length 94 [2022-11-22 01:30:07,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:07,349 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1223 transitions. [2022-11-22 01:30:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:07,350 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1223 transitions. [2022-11-22 01:30:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-22 01:30:07,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:07,351 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] [2022-11-22 01:30:07,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:30:07,351 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:07,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1189916405, now seen corresponding path program 1 times [2022-11-22 01:30:07,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:07,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035955529] [2022-11-22 01:30:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:07,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:07,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035955529] [2022-11-22 01:30:07,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035955529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:07,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:07,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:30:07,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483416385] [2022-11-22 01:30:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:07,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:07,494 INFO L87 Difference]: Start difference. First operand 928 states and 1223 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:08,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:08,132 INFO L93 Difference]: Finished difference Result 2644 states and 3529 transitions. [2022-11-22 01:30:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:08,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2022-11-22 01:30:08,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:08,138 INFO L225 Difference]: With dead ends: 2644 [2022-11-22 01:30:08,139 INFO L226 Difference]: Without dead ends: 1784 [2022-11-22 01:30:08,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:08,141 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 23 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:08,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 202 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:30:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-11-22 01:30:08,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1682. [2022-11-22 01:30:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1681 states have (on average 1.3224271267102914) internal successors, (2223), 1681 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2223 transitions. [2022-11-22 01:30:08,786 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2223 transitions. Word has length 97 [2022-11-22 01:30:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:08,786 INFO L495 AbstractCegarLoop]: Abstraction has 1682 states and 2223 transitions. [2022-11-22 01:30:08,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2223 transitions. [2022-11-22 01:30:08,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-22 01:30:08,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:08,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:30:08,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 01:30:08,788 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:08,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:08,789 INFO L85 PathProgramCache]: Analyzing trace with hash -338731655, now seen corresponding path program 1 times [2022-11-22 01:30:08,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:08,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987886717] [2022-11-22 01:30:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:08,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:49,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:49,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987886717] [2022-11-22 01:30:49,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987886717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:30:49,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673033359] [2022-11-22 01:30:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:49,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:49,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:49,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:30:49,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7aa4841-fa2f-4c00-867e-021314a9ce96/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:30:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:50,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 141 conjunts are in the unsatisfiable core [2022-11-22 01:30:50,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:32:46,567 WARN L233 SmtUtils]: Spent 14.71s on a formula simplification. DAG size of input: 284 DAG size of output: 271 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)