./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF --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 237919602f057be6bafc5b901424d626990bfa1f459ab937d0f6252d6c0cf13c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:35:49,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:35:49,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:35:49,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:35:49,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:35:49,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:35:49,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:35:49,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:35:49,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:35:49,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:35:49,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:35:49,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:35:49,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:35:49,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:35:49,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:35:49,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:35:49,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:35:49,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:35:49,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:35:49,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:35:49,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:35:49,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:35:49,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:35:49,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:35:49,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:35:49,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:35:49,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:35:49,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:35:49,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:35:49,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:35:49,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:35:49,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:35:49,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:35:49,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:35:49,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:35:49,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:35:49,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:35:49,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:35:49,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:35:49,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:35:49,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:35:49,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:35:49,300 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:35:49,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:35:49,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:35:49,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:35:49,302 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:35:49,302 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:35:49,302 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:35:49,302 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:35:49,302 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:35:49,303 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:35:49,303 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:35:49,304 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:35:49,304 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:35:49,304 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:35:49,304 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:35:49,304 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:35:49,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:35:49,305 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:35:49,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:35:49,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:35:49,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:35:49,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:35:49,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:35:49,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:35:49,307 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:35:49,307 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:35:49,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:35:49,307 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:35:49,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:35:49,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:35:49,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:35:49,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:35:49,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:35:49,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:35:49,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:35:49,310 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:35:49,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:35:49,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:35:49,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:35:49,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:35:49,311 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 237919602f057be6bafc5b901424d626990bfa1f459ab937d0f6252d6c0cf13c [2021-11-13 02:35:49,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:35:49,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:35:49,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:35:49,623 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:35:49,624 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:35:49,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-13 02:35:49,718 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/data/df259ef3a/05f00d5fb6ea4337ba7595a665c4b507/FLAGc0887f27a [2021-11-13 02:35:50,179 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:35:50,179 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-13 02:35:50,195 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/data/df259ef3a/05f00d5fb6ea4337ba7595a665c4b507/FLAGc0887f27a [2021-11-13 02:35:50,545 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/data/df259ef3a/05f00d5fb6ea4337ba7595a665c4b507 [2021-11-13 02:35:50,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:35:50,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:35:50,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:35:50,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:35:50,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:35:50,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:35:50" (1/1) ... [2021-11-13 02:35:50,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e56dfa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:50, skipping insertion in model container [2021-11-13 02:35:50,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:35:50" (1/1) ... [2021-11-13 02:35:50,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:35:50,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:35:50,920 WARN L228 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_15187caa-77ae-4161-8131-b3d828523d20/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2021-11-13 02:35:51,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:35:51,024 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:35:51,106 WARN L228 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_15187caa-77ae-4161-8131-b3d828523d20/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2021-11-13 02:35:51,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:35:51,184 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:35:51,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51 WrapperNode [2021-11-13 02:35:51,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:35:51,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:35:51,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:35:51,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:35:51,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:35:51,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:35:51,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:35:51,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:35:51,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:35:51,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:35:51,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:35:51,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:35:51,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:35:51,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:51,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:35:51,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15187caa-77ae-4161-8131-b3d828523d20/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:35:51,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:35:51,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:35:51,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:35:51,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:35:52,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:35:52,517 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 02:35:52,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:35:52 BoogieIcfgContainer [2021-11-13 02:35:52,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:35:52,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:35:52,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:35:52,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:35:52,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:35:50" (1/3) ... [2021-11-13 02:35:52,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44441500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:35:52, skipping insertion in model container [2021-11-13 02:35:52,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51" (2/3) ... [2021-11-13 02:35:52,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44441500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:35:52, skipping insertion in model container [2021-11-13 02:35:52,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:35:52" (3/3) ... [2021-11-13 02:35:52,533 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-13 02:35:52,541 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:35:52,568 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:35:52,630 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:35:52,637 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:35:52,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:35:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:35:52,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 02:35:52,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:52,666 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:35:52,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash 441315863, now seen corresponding path program 1 times [2021-11-13 02:35:52,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:52,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658021616] [2021-11-13 02:35:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:52,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:53,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:53,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658021616] [2021-11-13 02:35:53,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658021616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:53,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:53,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 02:35:53,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045461383] [2021-11-13 02:35:53,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:53,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:35:53,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:35:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:35:53,274 INFO L87 Difference]: Start difference. First operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 0 states have call successors, (0), 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 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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) [2021-11-13 02:35:53,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:53,757 INFO L93 Difference]: Finished difference Result 577 states and 924 transitions. [2021-11-13 02:35:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:35:53,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 [2021-11-13 02:35:53,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:53,785 INFO L225 Difference]: With dead ends: 577 [2021-11-13 02:35:53,785 INFO L226 Difference]: Without dead ends: 480 [2021-11-13 02:35:53,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:35:53,798 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 870 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 238.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.51ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 282.23ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:53,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1146 Invalid, 215 Unknown, 0 Unchecked, 24.51ms Time], IncrementalHoareTripleChecker [25 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 282.23ms Time] [2021-11-13 02:35:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-13 02:35:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 472. [2021-11-13 02:35:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.40552016985138) internal successors, (662), 471 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:35:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 662 transitions. [2021-11-13 02:35:53,915 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 662 transitions. Word has length 68 [2021-11-13 02:35:53,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:53,916 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 662 transitions. [2021-11-13 02:35:53,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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) [2021-11-13 02:35:53,917 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 662 transitions. [2021-11-13 02:35:53,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 02:35:53,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:53,927 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:35:53,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:35:53,928 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash -323387448, now seen corresponding path program 1 times [2021-11-13 02:35:53,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:53,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953180166] [2021-11-13 02:35:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:53,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:54,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:54,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953180166] [2021-11-13 02:35:54,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953180166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:54,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:54,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:35:54,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171029432] [2021-11-13 02:35:54,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:54,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:35:54,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:54,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:35:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:35:54,100 INFO L87 Difference]: Start difference. First operand 472 states and 662 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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) [2021-11-13 02:35:54,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:54,414 INFO L93 Difference]: Finished difference Result 1132 states and 1626 transitions. [2021-11-13 02:35:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:35:54,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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 [2021-11-13 02:35:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:54,419 INFO L225 Difference]: With dead ends: 1132 [2021-11-13 02:35:54,420 INFO L226 Difference]: Without dead ends: 702 [2021-11-13 02:35:54,429 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:35:54,431 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 595 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.10ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 220.81ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:54,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 224 Invalid, 217 Unknown, 0 Unchecked, 4.10ms Time], IncrementalHoareTripleChecker [6 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 220.81ms Time] [2021-11-13 02:35:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-11-13 02:35:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 700. [2021-11-13 02:35:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 1.4291845493562232) internal successors, (999), 699 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:35:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 999 transitions. [2021-11-13 02:35:54,525 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 999 transitions. Word has length 69 [2021-11-13 02:35:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:54,526 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 999 transitions. [2021-11-13 02:35:54,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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) [2021-11-13 02:35:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 999 transitions. [2021-11-13 02:35:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 02:35:54,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:54,533 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:35:54,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:35:54,534 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash 297823703, now seen corresponding path program 1 times [2021-11-13 02:35:54,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:54,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516359632] [2021-11-13 02:35:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:54,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:54,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:54,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516359632] [2021-11-13 02:35:54,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516359632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:54,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:54,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:35:54,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549798008] [2021-11-13 02:35:54,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:54,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:35:54,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:54,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:35:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:35:54,676 INFO L87 Difference]: Start difference. First operand 700 states and 999 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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) [2021-11-13 02:35:55,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:55,012 INFO L93 Difference]: Finished difference Result 1847 states and 2690 transitions. [2021-11-13 02:35:55,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:35:55,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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 [2021-11-13 02:35:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:55,021 INFO L225 Difference]: With dead ends: 1847 [2021-11-13 02:35:55,022 INFO L226 Difference]: Without dead ends: 1205 [2021-11-13 02:35:55,023 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:35:55,031 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 578 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 195.80ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:55,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 232 Invalid, 214 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 195.80ms Time] [2021-11-13 02:35:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-11-13 02:35:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1203. [2021-11-13 02:35:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.4467554076539102) internal successors, (1739), 1202 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:35:55,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1739 transitions. [2021-11-13 02:35:55,151 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1739 transitions. Word has length 69 [2021-11-13 02:35:55,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:55,153 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1739 transitions. [2021-11-13 02:35:55,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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) [2021-11-13 02:35:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1739 transitions. [2021-11-13 02:35:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 02:35:55,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:55,156 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:35:55,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 02:35:55,157 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:55,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1325617626, now seen corresponding path program 1 times [2021-11-13 02:35:55,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:55,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777168692] [2021-11-13 02:35:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:55,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:55,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:55,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777168692] [2021-11-13 02:35:55,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777168692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:55,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:55,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:35:55,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150596518] [2021-11-13 02:35:55,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:55,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:35:55,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:35:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:35:55,289 INFO L87 Difference]: Start difference. First operand 1203 states and 1739 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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) [2021-11-13 02:35:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:55,702 INFO L93 Difference]: Finished difference Result 3333 states and 4883 transitions. [2021-11-13 02:35:55,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:35:55,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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 [2021-11-13 02:35:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:55,718 INFO L225 Difference]: With dead ends: 3333 [2021-11-13 02:35:55,718 INFO L226 Difference]: Without dead ends: 2211 [2021-11-13 02:35:55,721 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:35:55,728 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 561 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.76ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:55,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 240 Invalid, 211 Unknown, 0 Unchecked, 2.76ms Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 178.87ms Time] [2021-11-13 02:35:55,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-11-13 02:35:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2209. [2021-11-13 02:35:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 1.453804347826087) internal successors, (3210), 2208 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:35:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3210 transitions. [2021-11-13 02:35:55,927 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3210 transitions. Word has length 69 [2021-11-13 02:35:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:55,928 INFO L470 AbstractCegarLoop]: Abstraction has 2209 states and 3210 transitions. [2021-11-13 02:35:55,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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) [2021-11-13 02:35:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3210 transitions. [2021-11-13 02:35:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 02:35:55,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:55,930 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:35:55,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:35:55,931 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash -589774667, now seen corresponding path program 1 times [2021-11-13 02:35:55,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:55,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686500027] [2021-11-13 02:35:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:55,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:56,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:56,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686500027] [2021-11-13 02:35:56,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686500027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:56,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:56,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:35:56,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779271419] [2021-11-13 02:35:56,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:56,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:35:56,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:56,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:35:56,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:35:56,052 INFO L87 Difference]: Start difference. First operand 2209 states and 3210 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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) [2021-11-13 02:35:56,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:56,591 INFO L93 Difference]: Finished difference Result 6321 states and 9261 transitions. [2021-11-13 02:35:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:35:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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 [2021-11-13 02:35:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:56,617 INFO L225 Difference]: With dead ends: 6321 [2021-11-13 02:35:56,617 INFO L226 Difference]: Without dead ends: 4223 [2021-11-13 02:35:56,622 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:35:56,623 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 544 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.68ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.47ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:56,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 248 Invalid, 208 Unknown, 0 Unchecked, 2.68ms Time], IncrementalHoareTripleChecker [6 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 166.47ms Time] [2021-11-13 02:35:56,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2021-11-13 02:35:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4221. [2021-11-13 02:35:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4220 states have (on average 1.454265402843602) internal successors, (6137), 4220 states have internal predecessors, (6137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:35:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 6137 transitions. [2021-11-13 02:35:57,008 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 6137 transitions. Word has length 69 [2021-11-13 02:35:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:57,009 INFO L470 AbstractCegarLoop]: Abstraction has 4221 states and 6137 transitions. [2021-11-13 02:35:57,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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) [2021-11-13 02:35:57,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 6137 transitions. [2021-11-13 02:35:57,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 02:35:57,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:57,011 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:35:57,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:35:57,011 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:57,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1683020412, now seen corresponding path program 1 times [2021-11-13 02:35:57,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:57,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057280984] [2021-11-13 02:35:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:57,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:57,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:57,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057280984] [2021-11-13 02:35:57,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057280984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:57,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:57,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:35:57,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274317549] [2021-11-13 02:35:57,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:57,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:35:57,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:57,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:35:57,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:35:57,082 INFO L87 Difference]: Start difference. First operand 4221 states and 6137 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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) [2021-11-13 02:35:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:57,911 INFO L93 Difference]: Finished difference Result 12323 states and 18005 transitions. [2021-11-13 02:35:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:35:57,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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 [2021-11-13 02:35:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:57,959 INFO L225 Difference]: With dead ends: 12323 [2021-11-13 02:35:57,959 INFO L226 Difference]: Without dead ends: 8247 [2021-11-13 02:35:57,966 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:35:57,967 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 562 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.00ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 162.79ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:57,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 249 Invalid, 194 Unknown, 0 Unchecked, 3.00ms Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 162.79ms Time] [2021-11-13 02:35:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2021-11-13 02:35:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 8245. [2021-11-13 02:35:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8245 states, 8244 states have (on average 1.4517224648229015) internal successors, (11968), 8244 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:35:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8245 states to 8245 states and 11968 transitions. [2021-11-13 02:35:58,715 INFO L78 Accepts]: Start accepts. Automaton has 8245 states and 11968 transitions. Word has length 69 [2021-11-13 02:35:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:58,715 INFO L470 AbstractCegarLoop]: Abstraction has 8245 states and 11968 transitions. [2021-11-13 02:35:58,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 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) [2021-11-13 02:35:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8245 states and 11968 transitions. [2021-11-13 02:35:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 02:35:58,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:58,717 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:35:58,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:35:58,718 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:58,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:58,718 INFO L85 PathProgramCache]: Analyzing trace with hash -399863285, now seen corresponding path program 1 times [2021-11-13 02:35:58,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:58,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618455520] [2021-11-13 02:35:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:58,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:59,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:59,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618455520] [2021-11-13 02:35:59,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618455520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:59,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:59,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-13 02:35:59,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615108823] [2021-11-13 02:35:59,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:59,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 02:35:59,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:59,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 02:35:59,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:35:59,723 INFO L87 Difference]: Start difference. First operand 8245 states and 11968 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:02,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:02,997 INFO L93 Difference]: Finished difference Result 21194 states and 30743 transitions. [2021-11-13 02:36:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 02:36:02,998 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-13 02:36:02,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:03,081 INFO L225 Difference]: With dead ends: 21194 [2021-11-13 02:36:03,081 INFO L226 Difference]: Without dead ends: 21192 [2021-11-13 02:36:03,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2021-11-13 02:36:03,090 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 1005 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 862.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.94ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1021.23ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:03,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 1748 Invalid, 1053 Unknown, 0 Unchecked, 14.94ms Time], IncrementalHoareTripleChecker [29 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 1021.23ms Time] [2021-11-13 02:36:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21192 states. [2021-11-13 02:36:04,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21192 to 16316. [2021-11-13 02:36:04,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16316 states, 16315 states have (on average 1.446399019307386) internal successors, (23598), 16315 states have internal predecessors, (23598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16316 states to 16316 states and 23598 transitions. [2021-11-13 02:36:04,626 INFO L78 Accepts]: Start accepts. Automaton has 16316 states and 23598 transitions. Word has length 70 [2021-11-13 02:36:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:04,627 INFO L470 AbstractCegarLoop]: Abstraction has 16316 states and 23598 transitions. [2021-11-13 02:36:04,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 16316 states and 23598 transitions. [2021-11-13 02:36:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 02:36:04,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:04,629 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:36:04,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 02:36:04,630 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:04,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:04,631 INFO L85 PathProgramCache]: Analyzing trace with hash -720478741, now seen corresponding path program 1 times [2021-11-13 02:36:04,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:04,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132528783] [2021-11-13 02:36:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:04,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:05,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:05,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132528783] [2021-11-13 02:36:05,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132528783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:05,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:05,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-13 02:36:05,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364082105] [2021-11-13 02:36:05,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:05,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 02:36:05,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:05,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 02:36:05,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:36:05,475 INFO L87 Difference]: Start difference. First operand 16316 states and 23598 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:08,541 INFO L93 Difference]: Finished difference Result 26707 states and 38608 transitions. [2021-11-13 02:36:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 02:36:08,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-13 02:36:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:08,601 INFO L225 Difference]: With dead ends: 26707 [2021-11-13 02:36:08,601 INFO L226 Difference]: Without dead ends: 26705 [2021-11-13 02:36:08,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 02:36:08,609 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 1180 mSDsluCounter, 1720 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 627.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.80ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 741.06ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:08,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1180 Valid, 2045 Invalid, 743 Unknown, 0 Unchecked, 11.80ms Time], IncrementalHoareTripleChecker [43 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 741.06ms Time] [2021-11-13 02:36:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26705 states. [2021-11-13 02:36:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26705 to 16348. [2021-11-13 02:36:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16348 states, 16347 states have (on average 1.446014559246345) internal successors, (23638), 16347 states have internal predecessors, (23638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16348 states to 16348 states and 23638 transitions. [2021-11-13 02:36:09,793 INFO L78 Accepts]: Start accepts. Automaton has 16348 states and 23638 transitions. Word has length 70 [2021-11-13 02:36:09,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:09,794 INFO L470 AbstractCegarLoop]: Abstraction has 16348 states and 23638 transitions. [2021-11-13 02:36:09,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 16348 states and 23638 transitions. [2021-11-13 02:36:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 02:36:09,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:09,795 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:36:09,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 02:36:09,796 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:09,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1093759435, now seen corresponding path program 1 times [2021-11-13 02:36:09,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:09,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827783665] [2021-11-13 02:36:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:09,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:10,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:10,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827783665] [2021-11-13 02:36:10,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827783665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:10,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:10,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-13 02:36:10,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550939412] [2021-11-13 02:36:10,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:10,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 02:36:10,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 02:36:10,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:36:10,454 INFO L87 Difference]: Start difference. First operand 16348 states and 23638 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:13,213 INFO L93 Difference]: Finished difference Result 23993 states and 34652 transitions. [2021-11-13 02:36:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 02:36:13,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-13 02:36:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:13,282 INFO L225 Difference]: With dead ends: 23993 [2021-11-13 02:36:13,282 INFO L226 Difference]: Without dead ends: 23991 [2021-11-13 02:36:13,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2021-11-13 02:36:13,295 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 1182 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 590.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 2454 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.23ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 712.57ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:13,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1182 Valid, 2454 Invalid, 955 Unknown, 0 Unchecked, 8.23ms Time], IncrementalHoareTripleChecker [35 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 712.57ms Time] [2021-11-13 02:36:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23991 states. [2021-11-13 02:36:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23991 to 16374. [2021-11-13 02:36:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16374 states, 16373 states have (on average 1.4457338300861173) internal successors, (23671), 16373 states have internal predecessors, (23671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16374 states to 16374 states and 23671 transitions. [2021-11-13 02:36:14,540 INFO L78 Accepts]: Start accepts. Automaton has 16374 states and 23671 transitions. Word has length 70 [2021-11-13 02:36:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:14,541 INFO L470 AbstractCegarLoop]: Abstraction has 16374 states and 23671 transitions. [2021-11-13 02:36:14,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 16374 states and 23671 transitions. [2021-11-13 02:36:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 02:36:14,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:14,542 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:36:14,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 02:36:14,543 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:14,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash 207867307, now seen corresponding path program 1 times [2021-11-13 02:36:14,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:14,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122304156] [2021-11-13 02:36:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:14,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:15,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:15,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122304156] [2021-11-13 02:36:15,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122304156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:15,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:15,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-13 02:36:15,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052951479] [2021-11-13 02:36:15,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:15,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 02:36:15,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:15,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 02:36:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:36:15,160 INFO L87 Difference]: Start difference. First operand 16374 states and 23671 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:17,311 INFO L93 Difference]: Finished difference Result 21769 states and 31397 transitions. [2021-11-13 02:36:17,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 02:36:17,312 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-13 02:36:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:17,354 INFO L225 Difference]: With dead ends: 21769 [2021-11-13 02:36:17,354 INFO L226 Difference]: Without dead ends: 19719 [2021-11-13 02:36:17,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-11-13 02:36:17,362 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 881 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 600.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.09ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 726.97ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:17,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 2154 Invalid, 1108 Unknown, 0 Unchecked, 6.09ms Time], IncrementalHoareTripleChecker [25 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 726.97ms Time] [2021-11-13 02:36:17,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19719 states. [2021-11-13 02:36:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19719 to 18250. [2021-11-13 02:36:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18250 states, 18249 states have (on average 1.4435311523919119) internal successors, (26343), 18249 states have internal predecessors, (26343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18250 states to 18250 states and 26343 transitions. [2021-11-13 02:36:18,558 INFO L78 Accepts]: Start accepts. Automaton has 18250 states and 26343 transitions. Word has length 70 [2021-11-13 02:36:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:18,559 INFO L470 AbstractCegarLoop]: Abstraction has 18250 states and 26343 transitions. [2021-11-13 02:36:18,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 18250 states and 26343 transitions. [2021-11-13 02:36:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 02:36:18,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:18,561 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:36:18,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 02:36:18,561 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:18,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash -730500725, now seen corresponding path program 1 times [2021-11-13 02:36:18,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:18,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89316187] [2021-11-13 02:36:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:18,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:19,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:19,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89316187] [2021-11-13 02:36:19,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89316187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:19,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:19,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-13 02:36:19,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386387496] [2021-11-13 02:36:19,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:19,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 02:36:19,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:19,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 02:36:19,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-11-13 02:36:19,597 INFO L87 Difference]: Start difference. First operand 18250 states and 26343 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:23,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:23,414 INFO L93 Difference]: Finished difference Result 21488 states and 30946 transitions. [2021-11-13 02:36:23,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 02:36:23,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-13 02:36:23,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:23,461 INFO L225 Difference]: With dead ends: 21488 [2021-11-13 02:36:23,461 INFO L226 Difference]: Without dead ends: 21486 [2021-11-13 02:36:23,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 02:36:23,472 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 1289 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1417.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.30ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1666.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:23,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1289 Valid, 2440 Invalid, 2975 Unknown, 0 Unchecked, 10.30ms Time], IncrementalHoareTripleChecker [32 Valid, 2943 Invalid, 0 Unknown, 0 Unchecked, 1666.65ms Time] [2021-11-13 02:36:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21486 states. [2021-11-13 02:36:25,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21486 to 18268. [2021-11-13 02:36:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18268 states, 18267 states have (on average 1.4432035911753436) internal successors, (26363), 18267 states have internal predecessors, (26363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18268 states to 18268 states and 26363 transitions. [2021-11-13 02:36:25,082 INFO L78 Accepts]: Start accepts. Automaton has 18268 states and 26363 transitions. Word has length 70 [2021-11-13 02:36:25,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:25,083 INFO L470 AbstractCegarLoop]: Abstraction has 18268 states and 26363 transitions. [2021-11-13 02:36:25,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 18268 states and 26363 transitions. [2021-11-13 02:36:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 02:36:25,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:25,084 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:36:25,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 02:36:25,084 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:25,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1639788321, now seen corresponding path program 1 times [2021-11-13 02:36:25,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:25,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885146506] [2021-11-13 02:36:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:25,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:25,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:25,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885146506] [2021-11-13 02:36:25,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885146506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:25,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:25,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-13 02:36:25,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140429506] [2021-11-13 02:36:25,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:25,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 02:36:25,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:25,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 02:36:25,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:36:25,874 INFO L87 Difference]: Start difference. First operand 18268 states and 26363 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 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) [2021-11-13 02:36:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:29,808 INFO L93 Difference]: Finished difference Result 35129 states and 50679 transitions. [2021-11-13 02:36:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 02:36:29,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 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 [2021-11-13 02:36:29,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:29,867 INFO L225 Difference]: With dead ends: 35129 [2021-11-13 02:36:29,867 INFO L226 Difference]: Without dead ends: 35127 [2021-11-13 02:36:29,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 02:36:29,882 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 894 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 663.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 2357 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.17ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 788.94ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:29,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 2357 Invalid, 1164 Unknown, 0 Unchecked, 7.17ms Time], IncrementalHoareTripleChecker [41 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 788.94ms Time] [2021-11-13 02:36:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35127 states. [2021-11-13 02:36:31,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35127 to 18254. [2021-11-13 02:36:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18254 states, 18253 states have (on average 1.4433243850325974) internal successors, (26345), 18253 states have internal predecessors, (26345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18254 states to 18254 states and 26345 transitions. [2021-11-13 02:36:31,356 INFO L78 Accepts]: Start accepts. Automaton has 18254 states and 26345 transitions. Word has length 72 [2021-11-13 02:36:31,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:31,356 INFO L470 AbstractCegarLoop]: Abstraction has 18254 states and 26345 transitions. [2021-11-13 02:36:31,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 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) [2021-11-13 02:36:31,357 INFO L276 IsEmpty]: Start isEmpty. Operand 18254 states and 26345 transitions. [2021-11-13 02:36:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 02:36:31,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:31,358 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:36:31,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 02:36:31,359 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash 174449855, now seen corresponding path program 1 times [2021-11-13 02:36:31,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:31,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679733352] [2021-11-13 02:36:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:31,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:31,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:31,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679733352] [2021-11-13 02:36:31,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679733352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:31,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:31,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-13 02:36:31,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201979689] [2021-11-13 02:36:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:31,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 02:36:31,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:31,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 02:36:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:36:31,971 INFO L87 Difference]: Start difference. First operand 18254 states and 26345 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:36:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:35,404 INFO L93 Difference]: Finished difference Result 37693 states and 54457 transitions. [2021-11-13 02:36:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 02:36:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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 [2021-11-13 02:36:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:35,459 INFO L225 Difference]: With dead ends: 37693 [2021-11-13 02:36:35,459 INFO L226 Difference]: Without dead ends: 37691 [2021-11-13 02:36:35,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2021-11-13 02:36:35,468 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 1032 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 496.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.63ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 585.29ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:35,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 1964 Invalid, 945 Unknown, 0 Unchecked, 5.63ms Time], IncrementalHoareTripleChecker [35 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 585.29ms Time] [2021-11-13 02:36:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37691 states. [2021-11-13 02:36:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37691 to 18260. [2021-11-13 02:36:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18260 states, 18259 states have (on average 1.4432334739032806) internal successors, (26352), 18259 states have internal predecessors, (26352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18260 states to 18260 states and 26352 transitions. [2021-11-13 02:36:36,869 INFO L78 Accepts]: Start accepts. Automaton has 18260 states and 26352 transitions. Word has length 72 [2021-11-13 02:36:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:36,870 INFO L470 AbstractCegarLoop]: Abstraction has 18260 states and 26352 transitions. [2021-11-13 02:36:36,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:36:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 18260 states and 26352 transitions. [2021-11-13 02:36:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 02:36:36,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:36,873 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:36:36,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 02:36:36,873 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash -711442273, now seen corresponding path program 1 times [2021-11-13 02:36:36,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:36,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258737755] [2021-11-13 02:36:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:36,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:37,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:37,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258737755] [2021-11-13 02:36:37,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258737755] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:37,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:37,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-13 02:36:37,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559645668] [2021-11-13 02:36:37,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:37,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 02:36:37,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:37,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 02:36:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:36:37,621 INFO L87 Difference]: Start difference. First operand 18260 states and 26352 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:36:40,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:40,997 INFO L93 Difference]: Finished difference Result 40294 states and 58183 transitions. [2021-11-13 02:36:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 02:36:40,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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 [2021-11-13 02:36:40,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:41,048 INFO L225 Difference]: With dead ends: 40294 [2021-11-13 02:36:41,048 INFO L226 Difference]: Without dead ends: 36196 [2021-11-13 02:36:41,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2021-11-13 02:36:41,066 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 955 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 465.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.52ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 549.75ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:41,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [955 Valid, 1972 Invalid, 865 Unknown, 0 Unchecked, 5.52ms Time], IncrementalHoareTripleChecker [34 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 549.75ms Time] [2021-11-13 02:36:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36196 states. [2021-11-13 02:36:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36196 to 23372. [2021-11-13 02:36:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23372 states, 23371 states have (on average 1.4399897308630354) internal successors, (33654), 23371 states have internal predecessors, (33654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23372 states to 23372 states and 33654 transitions. [2021-11-13 02:36:43,077 INFO L78 Accepts]: Start accepts. Automaton has 23372 states and 33654 transitions. Word has length 72 [2021-11-13 02:36:43,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:43,077 INFO L470 AbstractCegarLoop]: Abstraction has 23372 states and 33654 transitions. [2021-11-13 02:36:43,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:36:43,078 INFO L276 IsEmpty]: Start isEmpty. Operand 23372 states and 33654 transitions. [2021-11-13 02:36:43,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 02:36:43,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:43,079 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:36:43,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 02:36:43,080 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:43,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1649810305, now seen corresponding path program 1 times [2021-11-13 02:36:43,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:43,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146654139] [2021-11-13 02:36:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:43,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:43,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:43,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146654139] [2021-11-13 02:36:43,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146654139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:43,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:43,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-13 02:36:43,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174460126] [2021-11-13 02:36:43,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:43,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 02:36:43,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 02:36:43,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:36:43,815 INFO L87 Difference]: Start difference. First operand 23372 states and 33654 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:36:48,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:48,508 INFO L93 Difference]: Finished difference Result 44674 states and 64272 transitions. [2021-11-13 02:36:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 02:36:48,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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 [2021-11-13 02:36:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:48,563 INFO L225 Difference]: With dead ends: 44674 [2021-11-13 02:36:48,563 INFO L226 Difference]: Without dead ends: 44672 [2021-11-13 02:36:48,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=822, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 02:36:48,575 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 1363 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 366.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.96ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 434.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:48,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1363 Valid, 1355 Invalid, 594 Unknown, 0 Unchecked, 4.96ms Time], IncrementalHoareTripleChecker [50 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 434.54ms Time] [2021-11-13 02:36:48,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44672 states. [2021-11-13 02:36:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44672 to 23368. [2021-11-13 02:36:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23368 states, 23367 states have (on average 1.4399366628150811) internal successors, (33647), 23367 states have internal predecessors, (33647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23368 states to 23368 states and 33647 transitions. [2021-11-13 02:36:50,729 INFO L78 Accepts]: Start accepts. Automaton has 23368 states and 33647 transitions. Word has length 72 [2021-11-13 02:36:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:50,730 INFO L470 AbstractCegarLoop]: Abstraction has 23368 states and 33647 transitions. [2021-11-13 02:36:50,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:36:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 23368 states and 33647 transitions. [2021-11-13 02:36:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 02:36:50,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:50,731 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:36:50,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 02:36:50,731 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:50,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1300641951, now seen corresponding path program 1 times [2021-11-13 02:36:50,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:50,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375849822] [2021-11-13 02:36:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:50,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:51,495 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:51,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375849822] [2021-11-13 02:36:51,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375849822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:51,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:51,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-13 02:36:51,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132468138] [2021-11-13 02:36:51,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:51,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 02:36:51,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:51,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 02:36:51,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:36:51,497 INFO L87 Difference]: Start difference. First operand 23368 states and 33647 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:36:55,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:55,825 INFO L93 Difference]: Finished difference Result 35907 states and 51657 transitions. [2021-11-13 02:36:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 02:36:55,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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 [2021-11-13 02:36:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:55,876 INFO L225 Difference]: With dead ends: 35907 [2021-11-13 02:36:55,876 INFO L226 Difference]: Without dead ends: 35905 [2021-11-13 02:36:55,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 02:36:55,887 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 1190 mSDsluCounter, 2062 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 678.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.47ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 805.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:55,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1190 Valid, 2405 Invalid, 1147 Unknown, 0 Unchecked, 7.47ms Time], IncrementalHoareTripleChecker [39 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 805.87ms Time] [2021-11-13 02:36:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35905 states. [2021-11-13 02:36:57,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35905 to 23384. [2021-11-13 02:36:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23384 states, 23383 states have (on average 1.43980669717316) internal successors, (33667), 23383 states have internal predecessors, (33667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:57,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23384 states to 23384 states and 33667 transitions. [2021-11-13 02:36:57,944 INFO L78 Accepts]: Start accepts. Automaton has 23384 states and 33667 transitions. Word has length 72 [2021-11-13 02:36:57,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:57,944 INFO L470 AbstractCegarLoop]: Abstraction has 23384 states and 33667 transitions. [2021-11-13 02:36:57,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:36:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 23384 states and 33667 transitions. [2021-11-13 02:36:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 02:36:57,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:57,947 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:36:57,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 02:36:57,947 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:57,947 INFO L85 PathProgramCache]: Analyzing trace with hash 414749823, now seen corresponding path program 1 times [2021-11-13 02:36:57,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:57,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620749016] [2021-11-13 02:36:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:57,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:59,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:59,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620749016] [2021-11-13 02:36:59,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620749016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:59,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:59,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-13 02:36:59,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008784978] [2021-11-13 02:36:59,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:59,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 02:36:59,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:59,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 02:36:59,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:36:59,089 INFO L87 Difference]: Start difference. First operand 23384 states and 33667 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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) [2021-11-13 02:37:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:03,292 INFO L93 Difference]: Finished difference Result 30713 states and 44135 transitions. [2021-11-13 02:37:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 02:37:03,293 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 [2021-11-13 02:37:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:03,345 INFO L225 Difference]: With dead ends: 30713 [2021-11-13 02:37:03,346 INFO L226 Difference]: Without dead ends: 28663 [2021-11-13 02:37:03,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 02:37:03,360 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 1394 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 2438 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1131.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.39ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1336.41ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:03,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1394 Valid, 2120 Invalid, 2466 Unknown, 0 Unchecked, 8.39ms Time], IncrementalHoareTripleChecker [28 Valid, 2438 Invalid, 0 Unknown, 0 Unchecked, 1336.41ms Time] [2021-11-13 02:37:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28663 states. [2021-11-13 02:37:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28663 to 23392. [2021-11-13 02:37:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23392 states, 23391 states have (on average 1.439827283998119) internal successors, (33679), 23391 states have internal predecessors, (33679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23392 states to 23392 states and 33679 transitions. [2021-11-13 02:37:05,541 INFO L78 Accepts]: Start accepts. Automaton has 23392 states and 33679 transitions. Word has length 72 [2021-11-13 02:37:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:05,541 INFO L470 AbstractCegarLoop]: Abstraction has 23392 states and 33679 transitions. [2021-11-13 02:37:05,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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) [2021-11-13 02:37:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 23392 states and 33679 transitions. [2021-11-13 02:37:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 02:37:05,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:05,543 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:37:05,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 02:37:05,544 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash -523618209, now seen corresponding path program 1 times [2021-11-13 02:37:05,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:05,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558743272] [2021-11-13 02:37:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:05,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:06,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:06,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558743272] [2021-11-13 02:37:06,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558743272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:06,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:06,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-13 02:37:06,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502315695] [2021-11-13 02:37:06,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:06,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 02:37:06,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 02:37:06,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:37:06,284 INFO L87 Difference]: Start difference. First operand 23392 states and 33679 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 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) [2021-11-13 02:37:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:11,281 INFO L93 Difference]: Finished difference Result 40319 states and 58070 transitions. [2021-11-13 02:37:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 02:37:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 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 [2021-11-13 02:37:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:11,345 INFO L225 Difference]: With dead ends: 40319 [2021-11-13 02:37:11,345 INFO L226 Difference]: Without dead ends: 40317 [2021-11-13 02:37:11,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 02:37:11,359 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 1211 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 792.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.21ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 921.85ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:11,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 2619 Invalid, 1198 Unknown, 0 Unchecked, 10.21ms Time], IncrementalHoareTripleChecker [41 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 921.85ms Time] [2021-11-13 02:37:11,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40317 states. [2021-11-13 02:37:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40317 to 23409. [2021-11-13 02:37:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23409 states, 23408 states have (on average 1.4396787423103212) internal successors, (33700), 23408 states have internal predecessors, (33700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23409 states to 23409 states and 33700 transitions. [2021-11-13 02:37:13,691 INFO L78 Accepts]: Start accepts. Automaton has 23409 states and 33700 transitions. Word has length 72 [2021-11-13 02:37:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:13,691 INFO L470 AbstractCegarLoop]: Abstraction has 23409 states and 33700 transitions. [2021-11-13 02:37:13,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 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) [2021-11-13 02:37:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 23409 states and 33700 transitions. [2021-11-13 02:37:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 02:37:13,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:13,693 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:37:13,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 02:37:13,693 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:13,693 INFO L85 PathProgramCache]: Analyzing trace with hash 140914783, now seen corresponding path program 1 times [2021-11-13 02:37:13,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:13,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029728624] [2021-11-13 02:37:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:13,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:14,438 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:14,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029728624] [2021-11-13 02:37:14,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029728624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:14,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:14,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-13 02:37:14,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464459879] [2021-11-13 02:37:14,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:14,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 02:37:14,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 02:37:14,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:37:14,440 INFO L87 Difference]: Start difference. First operand 23409 states and 33700 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:37:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:17,807 INFO L93 Difference]: Finished difference Result 30728 states and 44155 transitions. [2021-11-13 02:37:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 02:37:17,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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 [2021-11-13 02:37:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:17,844 INFO L225 Difference]: With dead ends: 30728 [2021-11-13 02:37:17,844 INFO L226 Difference]: Without dead ends: 28678 [2021-11-13 02:37:17,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2021-11-13 02:37:17,853 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 926 mSDsluCounter, 2368 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 367.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.92ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 432.77ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:17,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 2682 Invalid, 633 Unknown, 0 Unchecked, 5.92ms Time], IncrementalHoareTripleChecker [25 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 432.77ms Time] [2021-11-13 02:37:17,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28678 states. [2021-11-13 02:37:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28678 to 23422. [2021-11-13 02:37:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23422 states, 23421 states have (on average 1.4395627855343496) internal successors, (33716), 23421 states have internal predecessors, (33716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23422 states to 23422 states and 33716 transitions. [2021-11-13 02:37:19,949 INFO L78 Accepts]: Start accepts. Automaton has 23422 states and 33716 transitions. Word has length 72 [2021-11-13 02:37:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:19,950 INFO L470 AbstractCegarLoop]: Abstraction has 23422 states and 33716 transitions. [2021-11-13 02:37:19,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:37:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 23422 states and 33716 transitions. [2021-11-13 02:37:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 02:37:19,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:19,952 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:37:19,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 02:37:19,952 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:19,953 INFO L85 PathProgramCache]: Analyzing trace with hash -797453249, now seen corresponding path program 1 times [2021-11-13 02:37:19,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:19,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095553514] [2021-11-13 02:37:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:19,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:20,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:20,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095553514] [2021-11-13 02:37:20,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095553514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:20,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:20,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-13 02:37:20,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869061636] [2021-11-13 02:37:20,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:20,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 02:37:20,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 02:37:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:37:20,588 INFO L87 Difference]: Start difference. First operand 23422 states and 33716 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:37:24,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:24,485 INFO L93 Difference]: Finished difference Result 35884 states and 51630 transitions. [2021-11-13 02:37:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 02:37:24,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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 [2021-11-13 02:37:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:24,531 INFO L225 Difference]: With dead ends: 35884 [2021-11-13 02:37:24,531 INFO L226 Difference]: Without dead ends: 35882 [2021-11-13 02:37:24,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2021-11-13 02:37:24,542 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 1115 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 378.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.77ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 449.34ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:24,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 1783 Invalid, 678 Unknown, 0 Unchecked, 4.77ms Time], IncrementalHoareTripleChecker [36 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 449.34ms Time] [2021-11-13 02:37:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35882 states. [2021-11-13 02:37:26,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35882 to 23430. [2021-11-13 02:37:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23430 states, 23429 states have (on average 1.4395407401084126) internal successors, (33727), 23429 states have internal predecessors, (33727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23430 states to 23430 states and 33727 transitions. [2021-11-13 02:37:26,852 INFO L78 Accepts]: Start accepts. Automaton has 23430 states and 33727 transitions. Word has length 72 [2021-11-13 02:37:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:26,852 INFO L470 AbstractCegarLoop]: Abstraction has 23430 states and 33727 transitions. [2021-11-13 02:37:26,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:37:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 23430 states and 33727 transitions. [2021-11-13 02:37:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 02:37:26,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:26,854 INFO L514 BasicCegarLoop]: 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] [2021-11-13 02:37:26,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 02:37:26,854 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:26,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1736263649, now seen corresponding path program 1 times [2021-11-13 02:37:26,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:26,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9002246] [2021-11-13 02:37:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:26,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:27,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:27,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9002246] [2021-11-13 02:37:27,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9002246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:27,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:27,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-13 02:37:27,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523895914] [2021-11-13 02:37:27,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:27,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 02:37:27,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:27,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 02:37:27,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:37:27,523 INFO L87 Difference]: Start difference. First operand 23430 states and 33727 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:37:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:31,088 INFO L93 Difference]: Finished difference Result 28730 states and 41245 transitions. [2021-11-13 02:37:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 02:37:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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 [2021-11-13 02:37:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:31,122 INFO L225 Difference]: With dead ends: 28730 [2021-11-13 02:37:31,123 INFO L226 Difference]: Without dead ends: 28728 [2021-11-13 02:37:31,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-11-13 02:37:31,131 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 921 mSDsluCounter, 2230 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 563.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 2623 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.55ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 665.04ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:31,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 2623 Invalid, 950 Unknown, 0 Unchecked, 6.55ms Time], IncrementalHoareTripleChecker [24 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 665.04ms Time] [2021-11-13 02:37:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28728 states. [2021-11-13 02:37:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28728 to 24466. [2021-11-13 02:37:33,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24466 states, 24465 states have (on average 1.4380543633762517) internal successors, (35182), 24465 states have internal predecessors, (35182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24466 states to 24466 states and 35182 transitions. [2021-11-13 02:37:33,532 INFO L78 Accepts]: Start accepts. Automaton has 24466 states and 35182 transitions. Word has length 72 [2021-11-13 02:37:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:33,532 INFO L470 AbstractCegarLoop]: Abstraction has 24466 states and 35182 transitions. [2021-11-13 02:37:33,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 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) [2021-11-13 02:37:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24466 states and 35182 transitions. [2021-11-13 02:37:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 02:37:33,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:33,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:33,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 02:37:33,535 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:33,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:33,536 INFO L85 PathProgramCache]: Analyzing trace with hash 436842948, now seen corresponding path program 1 times [2021-11-13 02:37:33,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:33,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463748406] [2021-11-13 02:37:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:33,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:33,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:33,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463748406] [2021-11-13 02:37:33,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463748406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:33,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:33,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:37:33,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775729717] [2021-11-13 02:37:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:33,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:37:33,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:33,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:37:33,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:37:33,568 INFO L87 Difference]: Start difference. First operand 24466 states and 35182 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:35,840 INFO L93 Difference]: Finished difference Result 43314 states and 62420 transitions. [2021-11-13 02:37:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:37:35,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-13 02:37:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:35,871 INFO L225 Difference]: With dead ends: 43314 [2021-11-13 02:37:35,871 INFO L226 Difference]: Without dead ends: 23762 [2021-11-13 02:37:35,897 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:37:35,898 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 148 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.86ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:35,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 371 Invalid, 48 Unknown, 0 Unchecked, 0.86ms Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 45.92ms Time] [2021-11-13 02:37:35,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23762 states. [2021-11-13 02:37:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23762 to 23760. [2021-11-13 02:37:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23760 states, 23759 states have (on average 1.4364240919230606) internal successors, (34128), 23759 states have internal predecessors, (34128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:38,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23760 states to 23760 states and 34128 transitions. [2021-11-13 02:37:38,246 INFO L78 Accepts]: Start accepts. Automaton has 23760 states and 34128 transitions. Word has length 73 [2021-11-13 02:37:38,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:38,246 INFO L470 AbstractCegarLoop]: Abstraction has 23760 states and 34128 transitions. [2021-11-13 02:37:38,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:38,246 INFO L276 IsEmpty]: Start isEmpty. Operand 23760 states and 34128 transitions. [2021-11-13 02:37:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 02:37:38,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:38,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:38,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-13 02:37:38,248 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:38,249 INFO L85 PathProgramCache]: Analyzing trace with hash 294656862, now seen corresponding path program 1 times [2021-11-13 02:37:38,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:38,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797588818] [2021-11-13 02:37:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:38,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:38,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:38,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797588818] [2021-11-13 02:37:38,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797588818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:38,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:38,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:37:38,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074892262] [2021-11-13 02:37:38,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:38,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:37:38,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:37:38,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:37:38,281 INFO L87 Difference]: Start difference. First operand 23760 states and 34128 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:40,539 INFO L93 Difference]: Finished difference Result 43123 states and 62079 transitions. [2021-11-13 02:37:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:37:40,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-13 02:37:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:40,565 INFO L225 Difference]: With dead ends: 43123 [2021-11-13 02:37:40,565 INFO L226 Difference]: Without dead ends: 23060 [2021-11-13 02:37:40,585 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:37:40,586 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 138 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.32ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:40,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 375 Invalid, 46 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 39.32ms Time] [2021-11-13 02:37:40,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23060 states. [2021-11-13 02:37:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23060 to 23058. [2021-11-13 02:37:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23058 states, 23057 states have (on average 1.43444507091122) internal successors, (33074), 23057 states have internal predecessors, (33074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23058 states to 23058 states and 33074 transitions. [2021-11-13 02:37:42,912 INFO L78 Accepts]: Start accepts. Automaton has 23058 states and 33074 transitions. Word has length 73 [2021-11-13 02:37:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:42,913 INFO L470 AbstractCegarLoop]: Abstraction has 23058 states and 33074 transitions. [2021-11-13 02:37:42,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 23058 states and 33074 transitions. [2021-11-13 02:37:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 02:37:42,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:42,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:42,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-13 02:37:42,915 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash 59046075, now seen corresponding path program 1 times [2021-11-13 02:37:42,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:42,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433280449] [2021-11-13 02:37:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:42,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:42,946 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:42,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433280449] [2021-11-13 02:37:42,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433280449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:42,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:42,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:37:42,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530871039] [2021-11-13 02:37:42,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:42,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:37:42,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:42,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:37:42,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:37:42,948 INFO L87 Difference]: Start difference. First operand 23058 states and 33074 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:45,138 INFO L93 Difference]: Finished difference Result 44313 states and 63770 transitions. [2021-11-13 02:37:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:37:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-13 02:37:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:45,166 INFO L225 Difference]: With dead ends: 44313 [2021-11-13 02:37:45,166 INFO L226 Difference]: Without dead ends: 22461 [2021-11-13 02:37:45,185 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:37:45,186 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 132 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:45,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 365 Invalid, 43 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 39.09ms Time] [2021-11-13 02:37:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22461 states. [2021-11-13 02:37:47,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22461 to 22345. [2021-11-13 02:37:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22345 states, 22344 states have (on average 1.4328678839957036) internal successors, (32016), 22344 states have internal predecessors, (32016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22345 states to 22345 states and 32016 transitions. [2021-11-13 02:37:47,456 INFO L78 Accepts]: Start accepts. Automaton has 22345 states and 32016 transitions. Word has length 73 [2021-11-13 02:37:47,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:47,456 INFO L470 AbstractCegarLoop]: Abstraction has 22345 states and 32016 transitions. [2021-11-13 02:37:47,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 22345 states and 32016 transitions. [2021-11-13 02:37:47,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:37:47,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:47,458 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:47,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-13 02:37:47,458 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1687568749, now seen corresponding path program 1 times [2021-11-13 02:37:47,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:47,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776466458] [2021-11-13 02:37:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:47,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:50,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:50,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776466458] [2021-11-13 02:37:50,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776466458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:50,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:50,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-11-13 02:37:50,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419337079] [2021-11-13 02:37:50,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:50,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 02:37:50,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:50,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 02:37:50,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-11-13 02:37:50,387 INFO L87 Difference]: Start difference. First operand 22345 states and 32016 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:05,211 INFO L93 Difference]: Finished difference Result 33905 states and 48546 transitions. [2021-11-13 02:38:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-13 02:38:05,212 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-13 02:38:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:05,260 INFO L225 Difference]: With dead ends: 33905 [2021-11-13 02:38:05,260 INFO L226 Difference]: Without dead ends: 33903 [2021-11-13 02:38:05,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 02:38:05,268 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 1635 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 4597 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3011.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 3002 SdHoareTripleChecker+Invalid, 4678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.36ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3492.07ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:05,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1635 Valid, 3002 Invalid, 4678 Unknown, 0 Unchecked, 19.36ms Time], IncrementalHoareTripleChecker [81 Valid, 4597 Invalid, 0 Unknown, 0 Unchecked, 3492.07ms Time] [2021-11-13 02:38:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33903 states. [2021-11-13 02:38:07,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33903 to 22351. [2021-11-13 02:38:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22351 states, 22350 states have (on average 1.4327964205816555) internal successors, (32023), 22350 states have internal predecessors, (32023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22351 states to 22351 states and 32023 transitions. [2021-11-13 02:38:07,762 INFO L78 Accepts]: Start accepts. Automaton has 22351 states and 32023 transitions. Word has length 74 [2021-11-13 02:38:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:07,762 INFO L470 AbstractCegarLoop]: Abstraction has 22351 states and 32023 transitions. [2021-11-13 02:38:07,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 22351 states and 32023 transitions. [2021-11-13 02:38:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:38:07,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:07,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:07,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-13 02:38:07,765 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:07,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1721506419, now seen corresponding path program 1 times [2021-11-13 02:38:07,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:38:07,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013676196] [2021-11-13 02:38:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:07,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:38:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:38:08,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:38:08,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013676196] [2021-11-13 02:38:08,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013676196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:08,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:08,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-13 02:38:08,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962532405] [2021-11-13 02:38:08,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:08,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 02:38:08,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:38:08,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 02:38:08,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:38:08,561 INFO L87 Difference]: Start difference. First operand 22351 states and 32023 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:14,193 INFO L93 Difference]: Finished difference Result 40404 states and 57886 transitions. [2021-11-13 02:38:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 02:38:14,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-13 02:38:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:14,249 INFO L225 Difference]: With dead ends: 40404 [2021-11-13 02:38:14,249 INFO L226 Difference]: Without dead ends: 36562 [2021-11-13 02:38:14,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 02:38:14,260 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 861 mSDsluCounter, 2555 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 741.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 2865 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.92ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 882.48ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:14,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 2865 Invalid, 1239 Unknown, 0 Unchecked, 8.92ms Time], IncrementalHoareTripleChecker [38 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 882.48ms Time] [2021-11-13 02:38:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36562 states. [2021-11-13 02:38:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36562 to 22372. [2021-11-13 02:38:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22372 states, 22371 states have (on average 1.4325242501452773) internal successors, (32047), 22371 states have internal predecessors, (32047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22372 states to 22372 states and 32047 transitions. [2021-11-13 02:38:17,178 INFO L78 Accepts]: Start accepts. Automaton has 22372 states and 32047 transitions. Word has length 74 [2021-11-13 02:38:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:17,179 INFO L470 AbstractCegarLoop]: Abstraction has 22372 states and 32047 transitions. [2021-11-13 02:38:17,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 22372 states and 32047 transitions. [2021-11-13 02:38:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:38:17,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:17,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:17,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-13 02:38:17,181 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:17,182 INFO L85 PathProgramCache]: Analyzing trace with hash 783138387, now seen corresponding path program 1 times [2021-11-13 02:38:17,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:38:17,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608349171] [2021-11-13 02:38:17,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:17,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:38:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:38:19,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:38:19,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608349171] [2021-11-13 02:38:19,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608349171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:19,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:19,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-13 02:38:19,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964092178] [2021-11-13 02:38:19,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:19,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 02:38:19,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:38:19,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 02:38:19,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-11-13 02:38:19,229 INFO L87 Difference]: Start difference. First operand 22372 states and 32047 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:26,456 INFO L93 Difference]: Finished difference Result 25507 states and 36447 transitions. [2021-11-13 02:38:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 02:38:26,457 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-13 02:38:26,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:26,494 INFO L225 Difference]: With dead ends: 25507 [2021-11-13 02:38:26,494 INFO L226 Difference]: Without dead ends: 25505 [2021-11-13 02:38:26,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=700, Invalid=1952, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 02:38:26,501 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 1083 mSDsluCounter, 4105 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1445.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 4404 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.61ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1721.60ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:26,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 4404 Invalid, 2177 Unknown, 0 Unchecked, 15.61ms Time], IncrementalHoareTripleChecker [55 Valid, 2122 Invalid, 0 Unknown, 0 Unchecked, 1721.60ms Time] [2021-11-13 02:38:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25505 states. [2021-11-13 02:38:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25505 to 22366. [2021-11-13 02:38:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22366 states, 22365 states have (on average 1.432595573440644) internal successors, (32040), 22365 states have internal predecessors, (32040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22366 states to 22366 states and 32040 transitions. [2021-11-13 02:38:29,341 INFO L78 Accepts]: Start accepts. Automaton has 22366 states and 32040 transitions. Word has length 74 [2021-11-13 02:38:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:29,342 INFO L470 AbstractCegarLoop]: Abstraction has 22366 states and 32040 transitions. [2021-11-13 02:38:29,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 22366 states and 32040 transitions. [2021-11-13 02:38:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:38:29,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:29,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:29,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-13 02:38:29,344 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1447671379, now seen corresponding path program 1 times [2021-11-13 02:38:29,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:38:29,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911506269] [2021-11-13 02:38:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:29,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:38:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:38:30,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:38:30,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911506269] [2021-11-13 02:38:30,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911506269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:30,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:30,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-13 02:38:30,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559613069] [2021-11-13 02:38:30,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:30,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 02:38:30,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:38:30,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 02:38:30,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:38:30,074 INFO L87 Difference]: Start difference. First operand 22366 states and 32040 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:34,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:34,351 INFO L93 Difference]: Finished difference Result 29166 states and 41723 transitions. [2021-11-13 02:38:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 02:38:34,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-13 02:38:34,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:34,389 INFO L225 Difference]: With dead ends: 29166 [2021-11-13 02:38:34,389 INFO L226 Difference]: Without dead ends: 27244 [2021-11-13 02:38:34,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 02:38:34,395 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 829 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 457.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.33ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 546.99ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:34,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 2013 Invalid, 788 Unknown, 0 Unchecked, 6.33ms Time], IncrementalHoareTripleChecker [32 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 546.99ms Time] [2021-11-13 02:38:34,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27244 states. [2021-11-13 02:38:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27244 to 22372. [2021-11-13 02:38:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22372 states, 22371 states have (on average 1.4325242501452773) internal successors, (32047), 22371 states have internal predecessors, (32047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:37,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22372 states to 22372 states and 32047 transitions. [2021-11-13 02:38:37,092 INFO L78 Accepts]: Start accepts. Automaton has 22372 states and 32047 transitions. Word has length 74 [2021-11-13 02:38:37,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:37,092 INFO L470 AbstractCegarLoop]: Abstraction has 22372 states and 32047 transitions. [2021-11-13 02:38:37,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:37,093 INFO L276 IsEmpty]: Start isEmpty. Operand 22372 states and 32047 transitions. [2021-11-13 02:38:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:38:37,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:37,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:37,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-13 02:38:37,095 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:37,096 INFO L85 PathProgramCache]: Analyzing trace with hash 509303347, now seen corresponding path program 1 times [2021-11-13 02:38:37,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:38:37,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535420463] [2021-11-13 02:38:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:37,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:38:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:38:37,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:38:37,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535420463] [2021-11-13 02:38:37,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535420463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:37,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:37,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-13 02:38:37,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658053527] [2021-11-13 02:38:37,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:37,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 02:38:37,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:38:37,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 02:38:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:38:37,853 INFO L87 Difference]: Start difference. First operand 22372 states and 32047 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:44,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:44,076 INFO L93 Difference]: Finished difference Result 40278 states and 57547 transitions. [2021-11-13 02:38:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 02:38:44,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-13 02:38:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:44,137 INFO L225 Difference]: With dead ends: 40278 [2021-11-13 02:38:44,137 INFO L226 Difference]: Without dead ends: 40276 [2021-11-13 02:38:44,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 02:38:44,147 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 1011 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 400.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.36ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 480.02ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:44,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 2047 Invalid, 699 Unknown, 0 Unchecked, 6.36ms Time], IncrementalHoareTripleChecker [53 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 480.02ms Time] [2021-11-13 02:38:44,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40276 states. [2021-11-13 02:38:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40276 to 22372. [2021-11-13 02:38:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22372 states, 22371 states have (on average 1.4325242501452773) internal successors, (32047), 22371 states have internal predecessors, (32047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22372 states to 22372 states and 32047 transitions. [2021-11-13 02:38:47,151 INFO L78 Accepts]: Start accepts. Automaton has 22372 states and 32047 transitions. Word has length 74 [2021-11-13 02:38:47,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:47,151 INFO L470 AbstractCegarLoop]: Abstraction has 22372 states and 32047 transitions. [2021-11-13 02:38:47,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:47,152 INFO L276 IsEmpty]: Start isEmpty. Operand 22372 states and 32047 transitions. [2021-11-13 02:38:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:38:47,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:47,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:47,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-13 02:38:47,153 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:47,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash -429507053, now seen corresponding path program 1 times [2021-11-13 02:38:47,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:38:47,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200885580] [2021-11-13 02:38:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:47,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:38:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:38:48,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:38:48,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200885580] [2021-11-13 02:38:48,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200885580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:48,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:48,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-13 02:38:48,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780867830] [2021-11-13 02:38:48,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:48,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 02:38:48,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:38:48,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 02:38:48,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-11-13 02:38:48,789 INFO L87 Difference]: Start difference. First operand 22372 states and 32047 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:55,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:55,665 INFO L93 Difference]: Finished difference Result 27343 states and 39063 transitions. [2021-11-13 02:38:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 02:38:55,666 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-13 02:38:55,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:55,705 INFO L225 Difference]: With dead ends: 27343 [2021-11-13 02:38:55,706 INFO L226 Difference]: Without dead ends: 27341 [2021-11-13 02:38:55,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=613, Invalid=2039, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 02:38:55,715 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 1288 mSDsluCounter, 3401 mSDsCounter, 0 mSdLazyCounter, 2070 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1400.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 3772 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.89ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1620.22ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:55,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1288 Valid, 3772 Invalid, 2109 Unknown, 0 Unchecked, 14.89ms Time], IncrementalHoareTripleChecker [39 Valid, 2070 Invalid, 0 Unknown, 0 Unchecked, 1620.22ms Time] [2021-11-13 02:38:55,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27341 states. [2021-11-13 02:38:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27341 to 22372. [2021-11-13 02:38:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22372 states, 22371 states have (on average 1.4325242501452773) internal successors, (32047), 22371 states have internal predecessors, (32047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22372 states to 22372 states and 32047 transitions. [2021-11-13 02:38:58,713 INFO L78 Accepts]: Start accepts. Automaton has 22372 states and 32047 transitions. Word has length 74 [2021-11-13 02:38:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:58,713 INFO L470 AbstractCegarLoop]: Abstraction has 22372 states and 32047 transitions. [2021-11-13 02:38:58,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:58,714 INFO L276 IsEmpty]: Start isEmpty. Operand 22372 states and 32047 transitions. [2021-11-13 02:38:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:38:58,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:58,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:58,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-13 02:38:58,716 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:58,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1386517043, now seen corresponding path program 1 times [2021-11-13 02:38:58,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:38:58,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150776137] [2021-11-13 02:38:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:58,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:38:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:00,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:39:00,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150776137] [2021-11-13 02:39:00,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150776137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:00,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:00,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-13 02:39:00,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524938112] [2021-11-13 02:39:00,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:00,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 02:39:00,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:39:00,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 02:39:00,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-11-13 02:39:00,254 INFO L87 Difference]: Start difference. First operand 22372 states and 32047 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:07,573 INFO L93 Difference]: Finished difference Result 29245 states and 41815 transitions. [2021-11-13 02:39:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 02:39:07,573 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-13 02:39:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:07,612 INFO L225 Difference]: With dead ends: 29245 [2021-11-13 02:39:07,612 INFO L226 Difference]: Without dead ends: 27323 [2021-11-13 02:39:07,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=519, Invalid=1643, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 02:39:07,624 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 1004 mSDsluCounter, 3207 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1450.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 3511 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.99ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1689.02ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:07,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 3511 Invalid, 2333 Unknown, 0 Unchecked, 13.99ms Time], IncrementalHoareTripleChecker [27 Valid, 2306 Invalid, 0 Unknown, 0 Unchecked, 1689.02ms Time] [2021-11-13 02:39:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27323 states. [2021-11-13 02:39:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27323 to 22378. [2021-11-13 02:39:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22378 states, 22377 states have (on average 1.4324529650980917) internal successors, (32054), 22377 states have internal predecessors, (32054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22378 states to 22378 states and 32054 transitions. [2021-11-13 02:39:10,647 INFO L78 Accepts]: Start accepts. Automaton has 22378 states and 32054 transitions. Word has length 74 [2021-11-13 02:39:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:10,647 INFO L470 AbstractCegarLoop]: Abstraction has 22378 states and 32054 transitions. [2021-11-13 02:39:10,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 22378 states and 32054 transitions. [2021-11-13 02:39:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:39:10,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:10,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:10,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-13 02:39:10,650 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:10,650 INFO L85 PathProgramCache]: Analyzing trace with hash 448149011, now seen corresponding path program 1 times [2021-11-13 02:39:10,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:39:10,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095328615] [2021-11-13 02:39:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:10,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:39:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:11,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:39:11,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095328615] [2021-11-13 02:39:11,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095328615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:11,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:11,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-13 02:39:11,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251082425] [2021-11-13 02:39:11,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:11,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 02:39:11,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:39:11,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 02:39:11,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:39:11,422 INFO L87 Difference]: Start difference. First operand 22378 states and 32054 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:16,733 INFO L93 Difference]: Finished difference Result 31382 states and 44859 transitions. [2021-11-13 02:39:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 02:39:16,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-13 02:39:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:16,781 INFO L225 Difference]: With dead ends: 31382 [2021-11-13 02:39:16,781 INFO L226 Difference]: Without dead ends: 31380 [2021-11-13 02:39:16,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=877, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 02:39:16,792 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 898 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 586.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 2040 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.30ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 696.27ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:16,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 2040 Invalid, 1055 Unknown, 0 Unchecked, 7.30ms Time], IncrementalHoareTripleChecker [33 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 696.27ms Time] [2021-11-13 02:39:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31380 states. [2021-11-13 02:39:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31380 to 22378. [2021-11-13 02:39:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22378 states, 22377 states have (on average 1.4324529650980917) internal successors, (32054), 22377 states have internal predecessors, (32054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22378 states to 22378 states and 32054 transitions. [2021-11-13 02:39:19,809 INFO L78 Accepts]: Start accepts. Automaton has 22378 states and 32054 transitions. Word has length 74 [2021-11-13 02:39:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:19,809 INFO L470 AbstractCegarLoop]: Abstraction has 22378 states and 32054 transitions. [2021-11-13 02:39:19,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 22378 states and 32054 transitions. [2021-11-13 02:39:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:39:19,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:19,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:19,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-13 02:39:19,811 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash -490661389, now seen corresponding path program 1 times [2021-11-13 02:39:19,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:39:19,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238331639] [2021-11-13 02:39:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:19,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:39:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:20,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:39:20,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238331639] [2021-11-13 02:39:20,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238331639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:20,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:20,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-13 02:39:20,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982519119] [2021-11-13 02:39:20,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:20,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 02:39:20,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:39:20,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 02:39:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:39:20,600 INFO L87 Difference]: Start difference. First operand 22378 states and 32054 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:25,459 INFO L93 Difference]: Finished difference Result 28302 states and 40411 transitions. [2021-11-13 02:39:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 02:39:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-13 02:39:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:25,502 INFO L225 Difference]: With dead ends: 28302 [2021-11-13 02:39:25,502 INFO L226 Difference]: Without dead ends: 28300 [2021-11-13 02:39:25,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 02:39:25,512 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 1013 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 502.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 3187 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.57ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 596.79ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:25,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1013 Valid, 3187 Invalid, 871 Unknown, 0 Unchecked, 8.57ms Time], IncrementalHoareTripleChecker [26 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 596.79ms Time] [2021-11-13 02:39:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28300 states. [2021-11-13 02:39:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28300 to 22386. [2021-11-13 02:39:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22386 states, 22385 states have (on average 1.4324324324324325) internal successors, (32065), 22385 states have internal predecessors, (32065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22386 states to 22386 states and 32065 transitions. [2021-11-13 02:39:28,548 INFO L78 Accepts]: Start accepts. Automaton has 22386 states and 32065 transitions. Word has length 74 [2021-11-13 02:39:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:28,548 INFO L470 AbstractCegarLoop]: Abstraction has 22386 states and 32065 transitions. [2021-11-13 02:39:28,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 22386 states and 32065 transitions. [2021-11-13 02:39:28,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:39:28,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:28,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:28,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-13 02:39:28,550 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:28,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:28,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1653129773, now seen corresponding path program 1 times [2021-11-13 02:39:28,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:39:28,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612079877] [2021-11-13 02:39:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:28,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:39:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:30,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:39:30,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612079877] [2021-11-13 02:39:30,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612079877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:30,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:30,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-13 02:39:30,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707052910] [2021-11-13 02:39:30,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:30,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 02:39:30,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:39:30,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 02:39:30,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-11-13 02:39:30,470 INFO L87 Difference]: Start difference. First operand 22386 states and 32065 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:37,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:37,753 INFO L93 Difference]: Finished difference Result 25491 states and 36432 transitions. [2021-11-13 02:39:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 02:39:37,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-13 02:39:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:37,793 INFO L225 Difference]: With dead ends: 25491 [2021-11-13 02:39:37,793 INFO L226 Difference]: Without dead ends: 25489 [2021-11-13 02:39:37,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-11-13 02:39:37,803 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 1160 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 2851 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1647.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.57ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1904.84ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:37,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1160 Valid, 2002 Invalid, 2879 Unknown, 0 Unchecked, 11.57ms Time], IncrementalHoareTripleChecker [28 Valid, 2851 Invalid, 0 Unknown, 0 Unchecked, 1904.84ms Time] [2021-11-13 02:39:37,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25489 states. [2021-11-13 02:39:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25489 to 24298. [2021-11-13 02:39:41,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24298 states, 24297 states have (on average 1.4307527678314196) internal successors, (34763), 24297 states have internal predecessors, (34763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24298 states to 24298 states and 34763 transitions. [2021-11-13 02:39:41,096 INFO L78 Accepts]: Start accepts. Automaton has 24298 states and 34763 transitions. Word has length 74 [2021-11-13 02:39:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:41,096 INFO L470 AbstractCegarLoop]: Abstraction has 24298 states and 34763 transitions. [2021-11-13 02:39:41,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 24298 states and 34763 transitions. [2021-11-13 02:39:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 02:39:41,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:41,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:41,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-13 02:39:41,098 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:41,099 INFO L85 PathProgramCache]: Analyzing trace with hash 453441429, now seen corresponding path program 1 times [2021-11-13 02:39:41,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:39:41,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862830484] [2021-11-13 02:39:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:41,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:39:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:41,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:39:41,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862830484] [2021-11-13 02:39:41,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862830484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:41,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:41,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:39:41,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320629462] [2021-11-13 02:39:41,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:41,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:39:41,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:39:41,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:39:41,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:39:41,129 INFO L87 Difference]: Start difference. First operand 24298 states and 34763 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:44,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:44,178 INFO L93 Difference]: Finished difference Result 40983 states and 58786 transitions. [2021-11-13 02:39:44,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:39:44,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-13 02:39:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:44,209 INFO L225 Difference]: With dead ends: 40983 [2021-11-13 02:39:44,209 INFO L226 Difference]: Without dead ends: 20649 [2021-11-13 02:39:44,231 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:39:44,231 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 133 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.31ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:44,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 363 Invalid, 47 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 48.31ms Time] [2021-11-13 02:39:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20649 states. [2021-11-13 02:39:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20649 to 20647. [2021-11-13 02:39:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20647 states, 20646 states have (on average 1.427152959411024) internal successors, (29465), 20646 states have internal predecessors, (29465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20647 states to 20647 states and 29465 transitions. [2021-11-13 02:39:47,159 INFO L78 Accepts]: Start accepts. Automaton has 20647 states and 29465 transitions. Word has length 75 [2021-11-13 02:39:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:47,160 INFO L470 AbstractCegarLoop]: Abstraction has 20647 states and 29465 transitions. [2021-11-13 02:39:47,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 20647 states and 29465 transitions. [2021-11-13 02:39:47,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 02:39:47,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:47,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:47,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-13 02:39:47,162 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:47,162 INFO L85 PathProgramCache]: Analyzing trace with hash -78270877, now seen corresponding path program 1 times [2021-11-13 02:39:47,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:39:47,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063181819] [2021-11-13 02:39:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:47,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:39:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:47,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:39:47,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063181819] [2021-11-13 02:39:47,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063181819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:47,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:47,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:39:47,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719696795] [2021-11-13 02:39:47,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:47,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:39:47,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:39:47,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:39:47,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:39:47,193 INFO L87 Difference]: Start difference. First operand 20647 states and 29465 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:50,095 INFO L93 Difference]: Finished difference Result 37359 states and 53464 transitions. [2021-11-13 02:39:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:39:50,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-13 02:39:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:50,121 INFO L225 Difference]: With dead ends: 37359 [2021-11-13 02:39:50,121 INFO L226 Difference]: Without dead ends: 19855 [2021-11-13 02:39:50,137 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:39:50,137 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 137 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.78ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.81ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:50,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 351 Invalid, 49 Unknown, 0 Unchecked, 0.78ms Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 40.81ms Time] [2021-11-13 02:39:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19855 states. [2021-11-13 02:39:52,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19855 to 19853. [2021-11-13 02:39:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19853 states, 19852 states have (on average 1.4251964537578077) internal successors, (28293), 19852 states have internal predecessors, (28293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19853 states to 19853 states and 28293 transitions. [2021-11-13 02:39:52,953 INFO L78 Accepts]: Start accepts. Automaton has 19853 states and 28293 transitions. Word has length 75 [2021-11-13 02:39:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:52,953 INFO L470 AbstractCegarLoop]: Abstraction has 19853 states and 28293 transitions. [2021-11-13 02:39:52,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:52,953 INFO L276 IsEmpty]: Start isEmpty. Operand 19853 states and 28293 transitions. [2021-11-13 02:39:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 02:39:52,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:52,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:52,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-13 02:39:52,955 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1245811929, now seen corresponding path program 1 times [2021-11-13 02:39:52,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:39:52,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328827157] [2021-11-13 02:39:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:52,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:39:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:57,514 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:39:57,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328827157] [2021-11-13 02:39:57,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328827157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:57,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:57,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-11-13 02:39:57,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540222346] [2021-11-13 02:39:57,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:57,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 02:39:57,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:39:57,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 02:39:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 02:39:57,516 INFO L87 Difference]: Start difference. First operand 19853 states and 28293 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:10,517 INFO L93 Difference]: Finished difference Result 26230 states and 37338 transitions. [2021-11-13 02:40:10,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-13 02:40:10,518 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-13 02:40:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:10,548 INFO L225 Difference]: With dead ends: 26230 [2021-11-13 02:40:10,548 INFO L226 Difference]: Without dead ends: 24436 [2021-11-13 02:40:10,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=927, Invalid=2979, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 02:40:10,555 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 1341 mSDsluCounter, 3129 mSDsCounter, 0 mSdLazyCounter, 2363 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1719.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 3434 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.05ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1968.70ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:10,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 3434 Invalid, 2410 Unknown, 0 Unchecked, 14.05ms Time], IncrementalHoareTripleChecker [47 Valid, 2363 Invalid, 0 Unknown, 0 Unchecked, 1968.70ms Time] [2021-11-13 02:40:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24436 states. [2021-11-13 02:40:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24436 to 19837. [2021-11-13 02:40:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19837 states, 19836 states have (on average 1.4254890098810244) internal successors, (28276), 19836 states have internal predecessors, (28276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:13,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19837 states to 19837 states and 28276 transitions. [2021-11-13 02:40:13,286 INFO L78 Accepts]: Start accepts. Automaton has 19837 states and 28276 transitions. Word has length 76 [2021-11-13 02:40:13,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:13,286 INFO L470 AbstractCegarLoop]: Abstraction has 19837 states and 28276 transitions. [2021-11-13 02:40:13,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:13,287 INFO L276 IsEmpty]: Start isEmpty. Operand 19837 states and 28276 transitions. [2021-11-13 02:40:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 02:40:13,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:13,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:13,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-13 02:40:13,288 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2110787335, now seen corresponding path program 1 times [2021-11-13 02:40:13,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:40:13,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388458312] [2021-11-13 02:40:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:13,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:40:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:40:16,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:40:16,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388458312] [2021-11-13 02:40:16,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388458312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:16,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:40:16,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-13 02:40:16,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393312001] [2021-11-13 02:40:16,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:16,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 02:40:16,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:40:16,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 02:40:16,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-11-13 02:40:16,321 INFO L87 Difference]: Start difference. First operand 19837 states and 28276 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:28,104 INFO L93 Difference]: Finished difference Result 28280 states and 40255 transitions. [2021-11-13 02:40:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-13 02:40:28,105 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-13 02:40:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:28,144 INFO L225 Difference]: With dead ends: 28280 [2021-11-13 02:40:28,144 INFO L226 Difference]: Without dead ends: 28278 [2021-11-13 02:40:28,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=911, Invalid=2871, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 02:40:28,153 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 1250 mSDsluCounter, 3250 mSDsCounter, 0 mSdLazyCounter, 4273 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2678.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 3601 SdHoareTripleChecker+Invalid, 4338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.13ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 4273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3066.80ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:28,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 3601 Invalid, 4338 Unknown, 0 Unchecked, 17.13ms Time], IncrementalHoareTripleChecker [65 Valid, 4273 Invalid, 0 Unknown, 0 Unchecked, 3066.80ms Time] [2021-11-13 02:40:28,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28278 states. [2021-11-13 02:40:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28278 to 19827. [2021-11-13 02:40:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19827 states, 19826 states have (on average 1.4256027438716836) internal successors, (28264), 19826 states have internal predecessors, (28264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19827 states to 19827 states and 28264 transitions. [2021-11-13 02:40:31,054 INFO L78 Accepts]: Start accepts. Automaton has 19827 states and 28264 transitions. Word has length 76 [2021-11-13 02:40:31,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:31,054 INFO L470 AbstractCegarLoop]: Abstraction has 19827 states and 28264 transitions. [2021-11-13 02:40:31,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 19827 states and 28264 transitions. [2021-11-13 02:40:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 02:40:31,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:31,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:31,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-13 02:40:31,056 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:31,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1171976935, now seen corresponding path program 1 times [2021-11-13 02:40:31,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:40:31,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490696981] [2021-11-13 02:40:31,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:31,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:40:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:40:34,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:40:34,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490696981] [2021-11-13 02:40:34,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490696981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:34,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:40:34,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-11-13 02:40:34,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479369794] [2021-11-13 02:40:34,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:34,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 02:40:34,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:40:34,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 02:40:34,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 02:40:34,376 INFO L87 Difference]: Start difference. First operand 19827 states and 28264 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:44,515 INFO L93 Difference]: Finished difference Result 22724 states and 32331 transitions. [2021-11-13 02:40:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-13 02:40:44,515 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-13 02:40:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:44,543 INFO L225 Difference]: With dead ends: 22724 [2021-11-13 02:40:44,543 INFO L226 Difference]: Without dead ends: 22722 [2021-11-13 02:40:44,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=760, Invalid=2780, Unknown=0, NotChecked=0, Total=3540 [2021-11-13 02:40:44,551 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 1708 mSDsluCounter, 3079 mSDsCounter, 0 mSdLazyCounter, 3548 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2409.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 3404 SdHoareTripleChecker+Invalid, 3635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.45ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2771.19ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:44,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1708 Valid, 3404 Invalid, 3635 Unknown, 0 Unchecked, 18.45ms Time], IncrementalHoareTripleChecker [87 Valid, 3548 Invalid, 0 Unknown, 0 Unchecked, 2771.19ms Time] [2021-11-13 02:40:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22722 states. [2021-11-13 02:40:47,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22722 to 19833. [2021-11-13 02:40:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19833 states, 19832 states have (on average 1.425524405002017) internal successors, (28271), 19832 states have internal predecessors, (28271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19833 states to 19833 states and 28271 transitions. [2021-11-13 02:40:47,448 INFO L78 Accepts]: Start accepts. Automaton has 19833 states and 28271 transitions. Word has length 76 [2021-11-13 02:40:47,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:47,449 INFO L470 AbstractCegarLoop]: Abstraction has 19833 states and 28271 transitions. [2021-11-13 02:40:47,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 19833 states and 28271 transitions. [2021-11-13 02:40:47,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 02:40:47,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:47,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:47,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-13 02:40:47,450 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:47,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:47,451 INFO L85 PathProgramCache]: Analyzing trace with hash 9508551, now seen corresponding path program 1 times [2021-11-13 02:40:47,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:40:47,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567031201] [2021-11-13 02:40:47,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:47,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:40:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:40:51,796 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:40:51,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567031201] [2021-11-13 02:40:51,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567031201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:51,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:40:51,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-11-13 02:40:51,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498018573] [2021-11-13 02:40:51,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:51,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 02:40:51,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:40:51,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 02:40:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 02:40:51,798 INFO L87 Difference]: Start difference. First operand 19833 states and 28271 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:03,285 INFO L93 Difference]: Finished difference Result 22764 states and 32376 transitions. [2021-11-13 02:41:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 02:41:03,285 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-13 02:41:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:03,311 INFO L225 Difference]: With dead ends: 22764 [2021-11-13 02:41:03,311 INFO L226 Difference]: Without dead ends: 22762 [2021-11-13 02:41:03,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=757, Invalid=2903, Unknown=0, NotChecked=0, Total=3660 [2021-11-13 02:41:03,316 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 1223 mSDsluCounter, 3198 mSDsCounter, 0 mSdLazyCounter, 4858 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3444.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 3516 SdHoareTripleChecker+Invalid, 4898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.72ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3929.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:03,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 3516 Invalid, 4898 Unknown, 0 Unchecked, 18.72ms Time], IncrementalHoareTripleChecker [40 Valid, 4858 Invalid, 0 Unknown, 0 Unchecked, 3929.87ms Time] [2021-11-13 02:41:03,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22762 states. [2021-11-13 02:41:06,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22762 to 19839. [2021-11-13 02:41:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19839 states, 19838 states have (on average 1.425446113519508) internal successors, (28278), 19838 states have internal predecessors, (28278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19839 states to 19839 states and 28278 transitions. [2021-11-13 02:41:06,123 INFO L78 Accepts]: Start accepts. Automaton has 19839 states and 28278 transitions. Word has length 76 [2021-11-13 02:41:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:06,123 INFO L470 AbstractCegarLoop]: Abstraction has 19839 states and 28278 transitions. [2021-11-13 02:41:06,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:06,123 INFO L276 IsEmpty]: Start isEmpty. Operand 19839 states and 28278 transitions. [2021-11-13 02:41:06,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 02:41:06,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:06,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:06,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-13 02:41:06,125 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:06,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1369733799, now seen corresponding path program 1 times [2021-11-13 02:41:06,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:41:06,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602164589] [2021-11-13 02:41:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:06,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:41:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:41:09,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:41:09,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602164589] [2021-11-13 02:41:09,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602164589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:09,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:09,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-11-13 02:41:09,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606998053] [2021-11-13 02:41:09,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:09,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 02:41:09,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:41:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 02:41:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-11-13 02:41:09,131 INFO L87 Difference]: Start difference. First operand 19839 states and 28278 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:18,013 INFO L93 Difference]: Finished difference Result 23651 states and 33632 transitions. [2021-11-13 02:41:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 02:41:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-13 02:41:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:18,043 INFO L225 Difference]: With dead ends: 23651 [2021-11-13 02:41:18,043 INFO L226 Difference]: Without dead ends: 23649 [2021-11-13 02:41:18,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=613, Invalid=2249, Unknown=0, NotChecked=0, Total=2862 [2021-11-13 02:41:18,048 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 1037 mSDsluCounter, 2082 mSDsCounter, 0 mSdLazyCounter, 2923 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2039.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.72ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2345.84ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:18,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 2395 Invalid, 2963 Unknown, 0 Unchecked, 13.72ms Time], IncrementalHoareTripleChecker [40 Valid, 2923 Invalid, 0 Unknown, 0 Unchecked, 2345.84ms Time] [2021-11-13 02:41:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23649 states. [2021-11-13 02:41:20,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23649 to 19839. [2021-11-13 02:41:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19839 states, 19838 states have (on average 1.425446113519508) internal successors, (28278), 19838 states have internal predecessors, (28278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19839 states to 19839 states and 28278 transitions. [2021-11-13 02:41:21,002 INFO L78 Accepts]: Start accepts. Automaton has 19839 states and 28278 transitions. Word has length 76 [2021-11-13 02:41:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:21,003 INFO L470 AbstractCegarLoop]: Abstraction has 19839 states and 28278 transitions. [2021-11-13 02:41:21,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 19839 states and 28278 transitions. [2021-11-13 02:41:21,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 02:41:21,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:21,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:21,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-13 02:41:21,004 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1437329051, now seen corresponding path program 1 times [2021-11-13 02:41:21,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:41:21,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133132107] [2021-11-13 02:41:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:21,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:41:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:41:30,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:41:30,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133132107] [2021-11-13 02:41:30,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133132107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:30,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:30,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-11-13 02:41:30,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153877413] [2021-11-13 02:41:30,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:30,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 02:41:30,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:41:30,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 02:41:30,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 02:41:30,702 INFO L87 Difference]: Start difference. First operand 19839 states and 28278 transitions. Second operand has 41 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:47,500 INFO L93 Difference]: Finished difference Result 22760 states and 32373 transitions. [2021-11-13 02:41:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-13 02:41:47,500 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-13 02:41:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:47,531 INFO L225 Difference]: With dead ends: 22760 [2021-11-13 02:41:47,531 INFO L226 Difference]: Without dead ends: 22758 [2021-11-13 02:41:47,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=988, Invalid=3434, Unknown=0, NotChecked=0, Total=4422 [2021-11-13 02:41:47,539 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 1150 mSDsluCounter, 3022 mSDsCounter, 0 mSdLazyCounter, 5262 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5034.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 3348 SdHoareTripleChecker+Invalid, 5315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.46ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 5262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5670.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:47,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 3348 Invalid, 5315 Unknown, 0 Unchecked, 23.46ms Time], IncrementalHoareTripleChecker [53 Valid, 5262 Invalid, 0 Unknown, 0 Unchecked, 5670.15ms Time] [2021-11-13 02:41:47,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22758 states. [2021-11-13 02:41:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22758 to 19815. [2021-11-13 02:41:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19815 states, 19814 states have (on average 1.4258605026748763) internal successors, (28252), 19814 states have internal predecessors, (28252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:50,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19815 states to 19815 states and 28252 transitions. [2021-11-13 02:41:50,416 INFO L78 Accepts]: Start accepts. Automaton has 19815 states and 28252 transitions. Word has length 78 [2021-11-13 02:41:50,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:50,416 INFO L470 AbstractCegarLoop]: Abstraction has 19815 states and 28252 transitions. [2021-11-13 02:41:50,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 19815 states and 28252 transitions. [2021-11-13 02:41:50,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 02:41:50,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:50,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:50,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-13 02:41:50,419 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:50,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:50,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1503727214, now seen corresponding path program 1 times [2021-11-13 02:41:50,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:41:50,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847792341] [2021-11-13 02:41:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:50,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:41:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:41:50,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:41:50,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847792341] [2021-11-13 02:41:50,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847792341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:50,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:50,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:41:50,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053016411] [2021-11-13 02:41:50,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:50,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:41:50,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:41:50,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:41:50,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:41:50,469 INFO L87 Difference]: Start difference. First operand 19815 states and 28252 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:53,728 INFO L93 Difference]: Finished difference Result 30903 states and 44392 transitions. [2021-11-13 02:41:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:41:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-13 02:41:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:53,760 INFO L225 Difference]: With dead ends: 30903 [2021-11-13 02:41:53,760 INFO L226 Difference]: Without dead ends: 24005 [2021-11-13 02:41:53,771 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:41:53,771 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 98 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:53,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 416 Invalid, 27 Unknown, 0 Unchecked, 0.74ms Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 30.38ms Time] [2021-11-13 02:41:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24005 states. [2021-11-13 02:41:56,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24005 to 22995. [2021-11-13 02:41:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22995 states, 22994 states have (on average 1.4251108984952596) internal successors, (32769), 22994 states have internal predecessors, (32769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22995 states to 22995 states and 32769 transitions. [2021-11-13 02:41:57,040 INFO L78 Accepts]: Start accepts. Automaton has 22995 states and 32769 transitions. Word has length 83 [2021-11-13 02:41:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:57,041 INFO L470 AbstractCegarLoop]: Abstraction has 22995 states and 32769 transitions. [2021-11-13 02:41:57,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 22995 states and 32769 transitions. [2021-11-13 02:41:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 02:41:57,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:57,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:57,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-13 02:41:57,046 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:57,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:57,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2108725483, now seen corresponding path program 1 times [2021-11-13 02:41:57,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:41:57,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760169105] [2021-11-13 02:41:57,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:57,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:41:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:41:57,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:41:57,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760169105] [2021-11-13 02:41:57,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760169105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:57,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:57,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:41:57,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338452941] [2021-11-13 02:41:57,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:57,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:41:57,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:41:57,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:41:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:41:57,091 INFO L87 Difference]: Start difference. First operand 22995 states and 32769 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:03,199 INFO L93 Difference]: Finished difference Result 60230 states and 85842 transitions. [2021-11-13 02:42:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:42:03,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-13 02:42:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:03,252 INFO L225 Difference]: With dead ends: 60230 [2021-11-13 02:42:03,252 INFO L226 Difference]: Without dead ends: 39316 [2021-11-13 02:42:03,269 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:42:03,269 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 106 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.61ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:03,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 444 Invalid, 31 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 36.61ms Time] [2021-11-13 02:42:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39316 states. [2021-11-13 02:42:09,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39316 to 39314. [2021-11-13 02:42:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39314 states, 39313 states have (on average 1.4146974283315952) internal successors, (55616), 39313 states have internal predecessors, (55616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39314 states to 39314 states and 55616 transitions. [2021-11-13 02:42:09,466 INFO L78 Accepts]: Start accepts. Automaton has 39314 states and 55616 transitions. Word has length 86 [2021-11-13 02:42:09,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:09,467 INFO L470 AbstractCegarLoop]: Abstraction has 39314 states and 55616 transitions. [2021-11-13 02:42:09,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:09,467 INFO L276 IsEmpty]: Start isEmpty. Operand 39314 states and 55616 transitions. [2021-11-13 02:42:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 02:42:09,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:09,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:09,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-13 02:42:09,471 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:09,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1864404235, now seen corresponding path program 1 times [2021-11-13 02:42:09,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:42:09,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462326366] [2021-11-13 02:42:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:09,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:42:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:09,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:42:09,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462326366] [2021-11-13 02:42:09,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462326366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:09,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:42:09,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:42:09,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102272465] [2021-11-13 02:42:09,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:09,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:42:09,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:42:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:42:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:42:09,515 INFO L87 Difference]: Start difference. First operand 39314 states and 55616 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:16,998 INFO L93 Difference]: Finished difference Result 66114 states and 94261 transitions. [2021-11-13 02:42:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:42:16,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-13 02:42:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:17,088 INFO L225 Difference]: With dead ends: 66114 [2021-11-13 02:42:17,088 INFO L226 Difference]: Without dead ends: 49408 [2021-11-13 02:42:17,111 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:42:17,111 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 93 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.80ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:17,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 397 Invalid, 28 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 32.80ms Time] [2021-11-13 02:42:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49408 states. [2021-11-13 02:42:24,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49408 to 46844. [2021-11-13 02:42:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46844 states, 46843 states have (on average 1.4128898661486242) internal successors, (66184), 46843 states have internal predecessors, (66184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46844 states to 46844 states and 66184 transitions. [2021-11-13 02:42:24,878 INFO L78 Accepts]: Start accepts. Automaton has 46844 states and 66184 transitions. Word has length 86 [2021-11-13 02:42:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:24,879 INFO L470 AbstractCegarLoop]: Abstraction has 46844 states and 66184 transitions. [2021-11-13 02:42:24,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:24,879 INFO L276 IsEmpty]: Start isEmpty. Operand 46844 states and 66184 transitions. [2021-11-13 02:42:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 02:42:24,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:24,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:24,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-13 02:42:24,884 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:24,885 INFO L85 PathProgramCache]: Analyzing trace with hash -876324416, now seen corresponding path program 1 times [2021-11-13 02:42:24,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:42:24,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319303867] [2021-11-13 02:42:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:24,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:42:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:24,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:42:24,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319303867] [2021-11-13 02:42:24,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319303867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:24,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:42:24,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:42:24,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742488965] [2021-11-13 02:42:24,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:24,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:42:24,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:42:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:42:24,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:42:24,925 INFO L87 Difference]: Start difference. First operand 46844 states and 66184 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:37,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:37,051 INFO L93 Difference]: Finished difference Result 112229 states and 158440 transitions. [2021-11-13 02:42:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:42:37,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-13 02:42:37,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:37,166 INFO L225 Difference]: With dead ends: 112229 [2021-11-13 02:42:37,166 INFO L226 Difference]: Without dead ends: 73843 [2021-11-13 02:42:37,193 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:42:37,193 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 97 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.05ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:37,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 439 Invalid, 37 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 33.05ms Time] [2021-11-13 02:42:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73843 states. [2021-11-13 02:42:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73843 to 73841. [2021-11-13 02:42:49,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73841 states, 73840 states have (on average 1.4011105092091007) internal successors, (103458), 73840 states have internal predecessors, (103458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73841 states to 73841 states and 103458 transitions. [2021-11-13 02:42:50,010 INFO L78 Accepts]: Start accepts. Automaton has 73841 states and 103458 transitions. Word has length 89 [2021-11-13 02:42:50,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:50,010 INFO L470 AbstractCegarLoop]: Abstraction has 73841 states and 103458 transitions. [2021-11-13 02:42:50,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 73841 states and 103458 transitions. [2021-11-13 02:42:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 02:42:50,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:50,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:50,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-13 02:42:50,016 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:50,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:50,016 INFO L85 PathProgramCache]: Analyzing trace with hash -549062176, now seen corresponding path program 1 times [2021-11-13 02:42:50,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:42:50,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419133682] [2021-11-13 02:42:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:50,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:42:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:50,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:42:50,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419133682] [2021-11-13 02:42:50,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419133682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:50,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:42:50,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:42:50,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798329350] [2021-11-13 02:42:50,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:50,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:42:50,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:42:50,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:42:50,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:42:50,061 INFO L87 Difference]: Start difference. First operand 73841 states and 103458 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)